• 1-D heat equation-boundary conditions

    Updated: 2010-04-30 05:15:09
    Consider an aluminum cylindrical rod 1.0 meter long connecting two heat reservoirs. Both of the reservoirs are maintained at T=300 K. Initially, the cylinder is at 300 K, except for the center...

  • Two pipes with equal pressures

    Updated: 2010-04-30 05:06:12
    *1. The problem statement, all variables and given/known data* A liquid is flowing through a horizontal pipe whose radius is 0.0215 m. The pipe bends straight upward through a height of 10.1 m....

  • Quick question about orbital angular momentum

    Updated: 2010-04-30 04:49:20
    I was asked for the energy and orbital angular momentum of a hydrogen atom in the 6f state. Thus, with n = 6 I found E to be -0.378, a straightforward calculation. I am confused about L, though. L...

  • calc 2 Lines and planes 3

    Updated: 2010-04-30 04:23:55
    *1. The problem statement, all variables and given/known data* Find an equation of a plane containing the three points (0, -4, 4), (5, -1, 1), (5, 0, 3) in which the coefficient of x is 9 *2....

  • "Onto" vs "into"

    Updated: 2010-04-30 04:18:43
    What is the difference between a homomorphism which is from a group G ONTO a group H and a homomorphism which is from a group G INTO a group H?

  • Energy Problem (IE and KE)

    Updated: 2010-04-30 03:46:49
    *1. The problem statement, all variables and given/known data* Jennifer applies a force of 2.0 N upon a 100.0 kg wagon, which was initially moving at 0.50 m/s. This force acts over a distance of...

  • Einstein Should Be Grateful He Didn’t Have Email

    Updated: 2010-04-29 21:50:26
    I’m reading an interesting new book, Bursts by Albert-Laszlo Barabasi. It’s just released today, but I scored an advance copy by virtue of sharing the same publisher. The basic idea is simple: human behavior obeys power laws! That is, things we occasionally do tend to be clustered together, rather than simply occurring [...]

  • Opinion: An African computing grid?

    Updated: 2010-04-29 21:43:20
    At the EGEE User Forum in Uppsala, the author, Bruce Becker of the Meraka Institute and coordinator of the South African National Grid, called for making an AfricaGrid a reality. Here he outlines the reasons why now is the opportune time for work on this to be starting in earnest.

  • U.S. oil spill growing

    Updated: 2010-04-29 13:30:00
    scientific american register Newsletters SA Digital Print Subscriber Services online sections News Features Mind Matters In-Depth Reports Fact or Fiction Extreme Tech Ask the Experts Edit This Slide Shows Image Gallery Videos 60-Second Science Podcast 60-Second Earth Podcast 60-Second Psych Podcast Science Talk Podcast Content Partners blogs Scientific American Observations Bering in Mind Extinction Countdown Solar at Home Expeditions Guest Blog scientific american magazine Subscribe INSIDE THIS ISSUE Features News Scan 50, 100 150 Years Ago Antigravity Skeptic Critical Mass Scientific American Perspectives Sustainable Developments Ask the Experts Recommendations Letters From the Editor Special Editions scientific american mind magazine Subscribe INSIDE THIS ISSUE Features Head Lines

  • April 2010 issue of symmetry now online

    Updated: 2010-04-29 05:38:26
    In this issue we outline a desperate shortage of accelerator scientists; walk you through the process of making a discovery at the Large Hadron Collider; and debut an original science-fiction story written especially for SLAC.

  • 19th Australian Institute of Physics Congress incorporating the 35th Australian Conference on Optical Fibre Technology

    Updated: 2010-04-29 00:00:00
    Conference/exhibition: 5 Dec 2010 - 9 Dec 2010, Melbourne, Victoria, Australia. Organized by Australian Institute of Physics / Australian Conference on Optical Fibre Technology / Australian Optical Society.

  • Baby Steps for the LHC

    Updated: 2010-04-28 22:33:21
    Since March 30, when the LHC at CERN first collided protons at an unprecedented total energy of 7 TeV (7 trillion electron volts) the machine has been steadily moving from crawling to walking. Last Saturday, I’d say it took its first steps, and like any toddler, will soon be running. The plot shows what [...]

  • Tiny horse could be world's smallest

    Updated: 2010-04-28 17:31:00
    scientific american register Newsletters SA Digital Print Subscriber Services online sections News Features Mind Matters In-Depth Reports Fact or Fiction Extreme Tech Ask the Experts Edit This Slide Shows Image Gallery Videos 60-Second Science Podcast 60-Second Earth Podcast 60-Second Psych Podcast Science Talk Podcast Content Partners blogs Scientific American Observations Bering in Mind Extinction Countdown Solar at Home Expeditions Guest Blog scientific american magazine Subscribe INSIDE THIS ISSUE Features News Scan 50, 100 150 Years Ago Antigravity Skeptic Critical Mass Scientific American Perspectives Sustainable Developments Ask the Experts Recommendations Letters From the Editor Special Editions scientific american mind magazine Subscribe INSIDE THIS ISSUE Features Head Lines

  • The Universe is Not a Black Hole

    Updated: 2010-04-28 17:13:51
    People sometimes ask, “Is the universe a black hole?” Or worse, they claim: “The universe is a black hole!” No, it’s not, and it’s worth getting this one straight. If there’s any quantitative reasoning behind the question (or claim), it comes from comparing the amount of matter within the observable universe to the radius [...]

  • New optical power meter with light source

    Updated: 2010-04-28 15:28:02
    This multimeter integrates the function of the fiber optic power meter and fiber optic light source, it can be switched the function by choosing accordingly button on the device menu.

  • DYNAFLOW, INC.

    Updated: 2010-04-28 15:27:30
    DYNAFLOW provides R&D services and products in fluid dynamics and material sciences. As a leader in bubble dynamics, cavitation and erosion dynamics, DYNAFLOW, serves the marine, energy, environmental, chemical, biomedical and agriculture industries.

  • Nanjing Dreams Laser Machinery&Equipment Co.,Ltd.

    Updated: 2010-04-28 15:27:10
    The Dreams is a professional laser applications to provide solutions to high-tech enterprises.It is a research and development, production, sales and service for a modern large-scale laser equipment business.

  • Nyfors Teknologi AB

    Updated: 2010-04-28 15:26:46
    Nyfors Teknologi AB develops and manufactures systems for preparation and testing in the field of fiber optic fusion splicing. Our products includes manual and automated systems for stripping, cleaving, recoating and proof-testing and fiber testing.

  • 20/20 FPD™ microspectrophotometer

    Updated: 2010-04-28 11:54:47
    The 20/20 FPD is designed for optical metrology of flat panel displays. Colorimetry and relative intensity of even sub-pixel areas can be done on everything from the latest OLEDs to microdisplays.

  • DR-BDT12D Semiconductor End-Pump Laser Marking Machine

    Updated: 2010-04-28 11:54:36
    Maximum laser power: 12W Laser wavelength: 1064nm Beam quality M2:

  • Blogginess

    Updated: 2010-04-27 19:42:34
    A handful of fun things that shouldn’t pass unremarked: Natalie Wolchover, an aspiring science writer, has started a fun blog called Facto Diem. For those of you who didn’t attend Catholic school, that’s Latin for “Fact of the Day.” (Or a close enough facsimile.) I didn’t even know there were that many facts [...]

  • CERN Offices

    Updated: 2010-04-27 18:41:25
    I’m curious to know what the best-looking office is at CERN. (If you know someone or if you think your office would be in the running for that let me know and I can post a picture!) From what I’ve personally seen, most offices here aren’t all that different from mine.  A little cramped, but at [...]

  • Protons not as “strange” as expected

    Updated: 2010-04-27 17:06:01
    The G-Zero experiment that measures the amount of strange quark contributions to the proton has found that there is a lot less strangeness than previous theories and experiments indicated.

  • Oil spill spreads in Gulf of Mexico

    Updated: 2010-04-27 14:30:00
    scientific american register Newsletters SA Digital Print Subscriber Services online sections News Features Mind Matters In-Depth Reports Fact or Fiction Extreme Tech Ask the Experts Edit This Slide Shows Image Gallery Videos 60-Second Science Podcast 60-Second Earth Podcast 60-Second Psych Podcast Science Talk Podcast Content Partners blogs Scientific American Observations Bering in Mind Extinction Countdown Solar at Home Expeditions Guest Blog scientific american magazine Subscribe INSIDE THIS ISSUE Features News Scan 50, 100 150 Years Ago Antigravity Skeptic Critical Mass Scientific American Perspectives Sustainable Developments Ask the Experts Recommendations Letters From the Editor Special Editions scientific american mind magazine Subscribe INSIDE THIS ISSUE Features Head Lines

  • Feeling squeezed

    Updated: 2010-04-27 09:07:36
    Here I am at CERN, after fairly smooth travels. (At least this time I didn’t show up with the flu.) The weather here is very nice for this time of the year, and the only evidence I can see for the eruption of Eyjafjallajokull (I love that name!) is somewhat lower attendance than [...]

  • From dust to stars

    Updated: 2010-04-27 05:37:09
    We’re all waiting for the Planck map of the cosmic microwave background (CMB), which should become the definitive map of the early Universe for the foreseeable future. While we’re on tenterhooks, the Planck team has been feeding us tidbits to keep us occupied. The first was a gorgeous map of the dust. Now they’ve released [...]

  • A long-lost object on the Moon will help test general relativity

    Updated: 2010-04-27 04:56:04
    In 1971, a Soviet moon lander called Lunokhod 1 sent its last signal back to Earth. Since that time, scientists have been keeping an eye out for it but not had any luck. Now, says a press release from the University of California, San Diego, the lander has been found, and a simple but important piece of cargo on it is intact.

  • The Quark Gluon Plasma

    Updated: 2010-04-26 17:18:22
    Much of the press coverage of the LHC has discussed the search for the Higgs, but ALICE was designed for something completely different.  We’re studying a hot, dense phase of nuclear matter called the Quark Gluon Plasma (QGP). What we’re doing is mapping out the phase diagram of nuclear matter.  This is roughly what we know [...]

  • Why physics will never be enjoyed by “normal” people, or why I hate the Big Bang Theory

    Updated: 2010-04-26 16:44:46
    “If they could teach Koko the gorilla sign language, surely I could teach you rudimentary physics.” -Sheldon to Penny (last Monday night’s episode) Sure, they routinely throw up things like the Schrodinger equation and make references to things like quantum mechanics… and whether or not I may laugh periodically… I really dislike The Big Bang Theory (BBT [...]

  • SkeptiCal 2010

    Updated: 2010-04-26 06:37:07
    I attended SkeptiCal 2010 on Saturday, a conference on science and skepticism organized by Bay Area Skeptics. The conference sold out all 200 slots, and the audience is a pretty lively bunch. I was invited here to speak at a breakout session in the afternoon on “Myths and Facts about the LHC” which [...]

  • What Are You Reading?

    Updated: 2010-04-26 04:36:00
    So, indeed, what are you reading? This wall asks the question at the LA Times Festival of Books, and I enjoy looking at what people have written, humourous remarks and all. (Click it for quite large version with readable scribbles.) Oh, me? What am I reading right now? Actually, I'm [...]

  • Live LHC Beam Plans

    Updated: 2010-04-26 04:35:48
    The LHC team have thankfully created a live status page to show all beam plans for the near future.  This is helpful to many of us who want to have some idea of what to expect when we’re on shift “babysitting” our detectors. You can see at present the main goal is to “complete squeeze to [...]

  • ALICE’s second paper!

    Updated: 2010-04-26 04:35:47
    ALICE’s second paper has been submitted!  If you’ve been following carefully, you’ll have heard that it’ll take at least a couple of years to get enough statistics to see the Higgs (if it’s there) – but we don’t have to wait that long for other results.  This paper presents a measurement of the number of [...]

  • Hawking: Beware the Alien Menace!

    Updated: 2010-04-26 04:02:53
    Okay, that’s a bit alarmist. But Stephen Hawking has generated a bit of buzz by pointing out that contact with an advanced alien civilization might not turn out well for us backward humans. In fact, we should just try to keep quiet and avoid being noticed. “If aliens visit us, the outcome would be [...]

  • The Higgs Boson Anthology: Yours to Keep and Share

    Updated: 2010-04-24 16:05:57
    All this week, some amazing writers have come together to bring you the Higgs Boson Anthology, a ser

  • Superconducting cavities could help reduce nuclear waste radiotoxicity

    Updated: 2010-04-23 03:36:08
    The European MYRRHA is an experimental facility aimed to demonstrate the technical feasibility of nuclear waste transmutation in an accelerator-driven system. The main part of the accelerator will consist in a series of superconducting cavities.

  • World's Highest Energy Particles (and No Black Hole Apocalypse)

    Updated: 2010-04-23 03:35:50
    Seven TRILLION electron volts! (7,000,000,000,000 eV) Or, 7 teraelectron volts. (7 TeV) Holy bug-zap

  • The Red Edge

    Updated: 2010-04-23 00:33:04
    We had a great time last night at a panel discussion on extrasolar planets, right here at my very own institution of Caltech, sponsored by our very own Discover magazine, and hosted by our very own Bad Astronomer. The panelists included Gibor Basri, John Johnson, Sara Seager, and Tori Hoehler. They did [...]

  • Wanna routinely win March Madness? Bet on science

    Updated: 2010-04-21 02:55:53
    When most people think of March Madness, they think of precision and brawn. But they ought to throw brains into that list. An analysis of the NCAA basketball championship shows that universities that participate in the QuarkNet particle physics outreach program outperform the others in the basketball.

  • Tevatron vs. LHC

    Updated: 2010-04-21 02:55:47
    The news from Fermilab is that the Tevatron has set a new luminosity record, with a store last Friday that had an initial luminosity of 4.04 x 1032cm-2s-1, or, equivalently, 404 inverse microbarns/sec. For more about this, see a new posting from Tommaso Dorigo, where someone from Fermilab writes in to comment that they’re [...]

  • Computing and Volcanos

    Updated: 2010-04-20 02:35:57
    The past few weeks have been really busy. Of course the flood of data and the prospects of an analysis are driving the work, so it’s a welcome change. I’ll also be heading over to CERN in about a week to go on shift. I’ll be there for about a month, and am excited to [...]

  • Budgeting

    Updated: 2010-04-20 02:35:56
    Hi there! Thought I’d put up today’s PhD comic, about research budgets in the US. Often we’re asked to justify the cost of our research, but it really is a pretty small fraction of the Federal budget. Although we often hear things like “The LHC cost $5 billion US”, that cost is spread over many years [...]

  • Physics operations

    Updated: 2010-04-20 02:35:54
    Yesterday I (virtually) attended the CMS “physics operations” meeting, the first meeting of this sort in the 7 TeV era. We’ll be having a few of these per week for the foreseeable future (but I probably won’t attend all of them). The goal of the meeting is to check in on how everyone [...]

  • monster follow-up

    Updated: 2010-04-20 02:35:54
    After reading everyone’s comments to my previous post, both positive and negative, let me first say thanks to those who took it with a sense of humor.  And also, thank you to those who like to hear about the human side of doing science. I will say my last paragraph there was a bit of a [...]

  • Monster Inc.

    Updated: 2010-04-20 02:35:53
    “This place eats relationships.” Don’t get me wrong.  Working at CERN gives a student many unique opportunities.  This includes being able to live and work in a foreign country, to collaborate with scientists from around the world, and to help make discoveries on the cutting edge of physics. Those advantages and others make it that much more [...]

  • Rediscovery! (kinda)

    Updated: 2010-04-20 02:35:52
    You’ve heard from us a few times that the first thing ATLAS (or CMS) will have to do is “rediscover” the physics that we’re pretty sure is there. ATLAS made a big step in that direction this week with the identification of the first W boson candidate events: This is a pretty big deal for [...]

  • Hurry Up!!

    Updated: 2010-04-20 02:35:51
    Preface: the folks over at the ATLAS control room blog are doing a great job too, so don’t miss their posts if you want more up-to-the-minute LHC news! A lot of people ask me when we’ll start announcing discoveries of new physics (or exclusions of new physics). It could take a while. Even I [...]

  • Being Careful

    Updated: 2010-04-20 02:35:51
    Physicists try to be very clear about what they say (believe it or not!). If we claim to have “discovered” something, then millions, or even billions, of dollars could be put towards studying it. We’d better be sure! Here are a couple of nice pictures we can talk about. Both are taken from [...]

  • Are you conCERNed about microscopic blackholes eating your planet?

    Updated: 2010-04-18 01:53:05
    Then follow @CERN and receive tweets about Large Hadron Collider activity. Be amongst the first to k

  • New Luminosity Record At The Tevatron

    Updated: 2010-04-17 13:42:56
    This is to inform you of the new luminosity record set today by the Tevatron collider at Fermilab. The machine has been working excellently, improving its performance as the machinists found ways to obtain higher stacks of antiprotons, reducing inefficiencies in the transport of the beams from one accelerator to the other in the injection process, or finding better beam tunes. A painstaking work that brought increasing returns, it seems. read more

  • Dark Matter: Can you hear me now?

    Updated: 2010-04-17 01:33:17
    Pockets of dark matter litter roughly 25 percent of the universe like patches of static you hit while surfing the radio dial: definitely there but of unclear origin. Through a process of elimination, Chicagoland Observatory for Underground Particle Physics collaborators say they have found a way to use sound to tune in dark matter passing through [...]

  • Einstein’s theory fights off challengers

    Updated: 2010-04-16 01:13:12
    Two new and independent studies have put Einstein's General Theory of Relativity to the test like never before. These results show Einstein's theory is still the best game in town.

  • Giant natural particle accelerator discovered above thunderclouds

    Updated: 2010-04-16 01:13:11
    A lightning researcher has discovered that during thunderstorms, giant natural particle accelerators can form 40 km above the surface of the Earth. His findings show that when particularly intense lightning discharges in thunderstorms coincide with high-energy particles coming in from space (cosmic rays), nature provides the right conditions to form a giant particle accelerator above the thunderclouds.

  • The future strikes back

    Updated: 2010-04-11 23:48:08
    Cnet reported 9 days ago: A would-be saboteur arrested today at the Large Hadron Collider in Switzer

  • Hunt For The God Particle

    Updated: 2010-04-11 23:48:07
    The universe – stars, planets, nebulae, the Milky Way, black holes – in its entirety and infinitenes

  • Calla Lily!

    Updated: 2010-04-11 23:48:07
    I'm very pleased to see this flower (and always delighted to say the name out loud: Try it: Calla Lily.). (Click for larger view.) I discovered a patch of shoots growing in the shade of a tall tree some time ago, struggling against a thriving ground cover plant, and decided to clear some space for them and let them grow up, giving them a supply line off the drip system. That was a year ago. Now, they're nice and large, and [...]

  • Other Accelerator Physics is Available

    Updated: 2010-04-11 23:48:05
    Skip to content Asymptotia She Blinded Me With Science Riverside Fun Other Accelerator Physics is Available Published by Clifford on April 8, 2010 in science The alternative title for this post was going to be Closing in on Unobtanium” , but I realized that it might be better to explicitly remind you that the Large Hadron Collider understandably featuring in the news a lot these days , is not the only particle accelerator in operation . Such machines are routinely at work all over the world for example , supplying hospitals with radioactive materials used in medical diagnosis and doing various kinds of key research recall as another example the RHIC physics I’ve told you a bit about in relation to certain applications of string theory One such set of investigations involves finding new

  • Demystifying the Origins of the Universe and the Dangers of Doing So

    Updated: 2010-04-11 23:48:04
    Understanding the origins of the universe has consumed philosophers, prophets, religious leaders, sc

  • Awesome

    Updated: 2010-04-11 23:48:01
    Skip to content Asymptotia Inspiration and Dedication Occult Activity Tonight Awesome Published by Clifford on April 5, 2010 in fun humour miscellany and science education I’ve never been one for the naive Obama-gushing , you may have noticed , but I can’t resist this lovely tribute . It is the site called President Obama Looking at Awesome Things” a collection of photos” , and the example to the left is one of my favourites . Click for larger view . It is excellent use of certain looks he gets on his face when doing things like looking interested” at things . Isn’t photoshop great The site is here and be sure to look at currently all three pages worth , or jump to the Flickr photo set here where I learned that the series is a response to New York Magazine’s rather brilliantly captioned A

  • Looking For Nothing?

    Updated: 2010-04-11 23:48:00
    I Don’t Know why we are so focussed. I do know, we can begin to see everything only when we lo

  • Conundrum Theoretical

    Updated: 2010-04-11 23:47:58
    Every theory, every idea, every bit of knowledge that is meant to progress society has already been

  • Space For Every Particle?

    Updated: 2010-04-11 23:47:57
    I Don’t Know why we ignore the space between particles. I do know, Space must exist for every

  • What's the Large Hadron Collider all about? And what's the Higgs Boson, anyway?

    Updated: 2010-04-11 23:47:54
    On March 30th, 2010, the Large Hadron Collider officially started it’s high energy physics pro

  • Large Hadron Collider sets record, doesn't destroy the world

    Updated: 2010-04-11 23:47:52
    CERN’s Large Hadron Collider was put to the test yesterday, sending two 3.5 trillion electron

  • Large Hadron Collider Goes Live

    Updated: 2010-04-11 23:47:52
    ‘Europe’s Large Hadron Collider (LHC) has produced record-breaking high-energy particle

  • using the 4th dimension as an anger management tool.

    Updated: 2010-04-11 23:47:46
    Aristotle said that the fourth dimension didn’t exist. Aristotle also said that women have a l

  • "Brave New World"

    Updated: 2010-04-11 23:47:45
    A Brave New World that has such ‘particles’ in it. As Miranda in The Tempest looks at the people tha

  • God's Particle

    Updated: 2010-04-11 23:47:45
    Today the world moved a step closer to discovering  if the ‘God’s Particle’ or the

  • The Most Expensive Scientific Experiment in History

    Updated: 2010-04-11 23:47:43
    Superimposed circle shows the location and extent of the LHC God damn that shit is BIG! The 10 BILLI

  • LHC: Kollision von Teilchenstrahlen mit Rekordenergie

    Updated: 2010-04-11 23:47:42
    (Golem.de) – Wissenschaftlern am Cern ist es gelungen, Teilchenstrahlen im Large Hadron Collid

  • Most Powerful Particle Collisions Yet

    Updated: 2010-04-11 23:47:40
    Large Hadron Collider smashes protons, record The Large Hadron Collider in Geneva succeeded early Tu

  • Why Particle Physics?

    Updated: 2010-04-11 23:47:30
    I have blogged less since Tuesday because I have been working with journalists at Northwestern to write articles and interviews on the start-up of the 7 TeV run of the LHC. This has been a very satisfying experience, since all three ladies and a young man are intelligent, attentive and enthusiastic about this momentous event and [...]

  • CMS Muons in 7 TeV Collisions

    Updated: 2010-04-11 23:47:29
    It is an exciting day, with thousands of 7 TeV collision events flowing in. I watched the frustrating first failures from my laptop at home, in the middle of the night. Now that the sun is up, the scenario is much brighter – CERN just held a press conference in which the Steve Myers and [...]

  • Some Notes from the LHC Commissioning Report

    Updated: 2010-04-11 23:47:28
    Mike Lamont delivered a report on the commissioning of the LHC. The slides are here. Below I offer some notes from his talk. Problem: as discovered at the final stages of the hardware commissioning, the quench protection system (QPS) can be triggered erroneously due to a converter switch being turned off at the same time [...]

  • Underlying Event – a definitive study by CDF

    Updated: 2010-04-11 23:47:27
    This weekend I read a superb paper by the CDF Collaboration (arXiv:1003.3146): Studying the Underlying Event in Drell-Yan and High Transverse Momentum Jet Production at the Tevatron This paper is written so very clearly that a very thorny and confusing phenomenon can be grasped with little effort. Even better, new results are presented which elucidate [...]

  • 3.76 E 32

    Updated: 2010-04-11 23:47:26
    The number in the title, interpreted in units per square centimeters per second, is a flux rate, and it is a new world record set by the Tevatron collider last night on the number of protons and antiprotons forced to cross each other within a tiny interaction region in the core of the CDF and DZERO experiments.<br / read more

  • Webcast tomorrow on LHC machine commissioning

    Updated: 2010-04-11 23:47:26
    FYI: tomorrow (Friday 26-March) there will be a webcast of a report by Mike Lamont on the current status of the LHC commissioning and of the plans for the next steps. The time is 15:15 at CERN, or 9:15am in Chicago (for example). For more information, see http://indico.cern.ch/conferenceDisplay.py?confId=88711 and http://www.cern.ch/webcast. This should be very interesting, [...]

  • Large Hadron Collider Creates "Son of God" Particle

    Updated: 2010-04-11 23:47:25
    In honor of the recent news of the Large Hadron Collider’s successful run-up to 7.0 TeV collis

  • Collisions at 7 TeV c.m. energy scheduled for 30-March

    Updated: 2010-04-11 23:47:25
    Rolf Heuer, Director General of CERN, announced today that the LHC is on schedule to provide collisions at 7 TeV on 30-March-2010, Tuesday a week from now. A quote from Steve Myers: “With two beams at 3.5 TeV, we’re on the verge of launching the LHC physics programme. But we’ve still got a lot of [...]

  • Large Hadron Collider Reaches 7.0 TeV Collisions

    Updated: 2010-04-11 23:47:24
    As a quick follow up to my recent post about the Large Hadron Collider, there is a new development:

  • First ATLAS Physics Paper: Charged Particle Multiplicities

    Updated: 2010-04-08 10:53:48
    Today the ATLAS Collaboration posted their first physics paper on the archive (arXiv:1003.3124): Charged-particle multiplicities in pp interactions at √s = 900  measured with the ATLAS detector at the LHC This is the third physics result from the LHC. The first paper was submitted by the ALICE Collaboration on 28-November (see my discussion here) and by the [...]

  • Ramping to 3.5 TeV: time line

    Updated: 2010-04-08 10:53:15
    Here is a summary of accelerator operations last night: - 16:30 Started ramp without beam at 2 A/s - 17:38 Trip of Sector 78 during dry ramp to 6 kA. To be understood. - Dump during the ramp due to BLM (problem with optical link for BLM in pt1, fixed). - 20:45 Try a second [...]

  • Large Hadron Collider Breaks High-Energy Physics Record... Earth Survives

    Updated: 2010-04-08 10:53:09
    **Addendum (3/22/2010): Shortly after I wrote the post below, it came to my attention that the proto

  • Twenty-three papers: Commissioning CMS

    Updated: 2010-04-08 10:52:50
    We were all rather down when the LHC magnet blew up in December 2008. Enough has been written about that. Quickly enough, the CMS Collaboration made the best of the situation and launched a serious campaign to commission the detector as much as possible using cosmic rays. The result is twenty-three scientific papers appearing as [...]

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