RHIC: In Pursuit of the Plasma BNL Summer Sunday 8/26/01.

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Presentation transcript:

RHIC: In Pursuit of the Plasma BNL Summer Sunday 8/26/01

RHIC at BNL Briefing Outline Our Suspect is... the Quark-Gluon Plasma (QGP) Who is a known informant... about the basic building blocks of nature An All Points Bulletin has been issued… QGP hide-outs are being monitored.

RHIC at BNL Quark-Gluon Plasma Dossier ProtonProton NeutronNeutron QuarksQuarks Held together by gluons NucleusNucleus AtomAtom KeyKey GluonsGluons M.O. : Within the QGP, the Quarks are set free! The QGP appears after a phase transition...

RHIC at BNL What is a phase transition? ICE WATER STEAM Add heat These are the phases of matter we see in our normal lives. SOLID LIQUID GAS

RHIC at BNL Phase Transitions and the QGP Protons and Neutrons Quarks

RHIC at BNL Quark-Gluon Plasma Hideouts The Early Universe Neutron Stars Collisions of Nuclei Hard to stake out. It happened billions of years ago. Hard to stake out. They are very far away. (possibly) Easy to stake out. We can make these ourselves!

RHIC at BNL The QGP in the Early Universe

RHIC at BNL Take two of the heaviest nuclei we can use. Grab a particle accelerator, the Relativistic Heavy Ion Collider, to accelerate them close to the speed of light. Crash them together to create our own QGP hide-out. Surround the hide-out site with surveillance equipment. How To Catch A Plasma

RHIC at BNL A briefing on RHIC Relativistic Einstein’s relativity E=mc 2, near light speed Elements like gold, without electrons Two ion beams hit head-on { { { Heavy Ion Collider

RHIC at BNL The Location of RHIC R H I C Route 25 William Floyd Pkwy. BNL Campus Berkner Hall

RHIC at BNL Setting Up A Trap for the QGP

RHIC at BNL RHIC’s particle beams reach % of the speed of light! That’s 186,000 miles per second, or over 60 million miles per hour!!! There are billions of ions in RHIC when it is operating with thousands of collisions each second! The energy in each collision is about the same as two mosquitoes colliding. Over 20 years, less than one gram of gold is used. A briefing on RHIC

RHIC at BNL A look inside the RHIC tunnel Over 1,600 miles of superconducting cable and over 78,100 pounds of helium! The magnets are cooled to -450 degrees Fahrenheit

RHIC at BNL PHOBOS STAR RHIC Surveillance Teams and Equipment

RHIC at BNL Mounting an International Operation Detectives from all over the world are searching for the Quark-Gluon Plasma. There are more than 1000 scientists participating in the 4 RHIC experiments.

RHIC at BNL The QGP: A Master of Disguise and Deception

RHIC at BNL In a head-on Gold-on-Gold collision, there are thousands of particles produced! A Simulation of a Collision at RHIC The elusive Quark-Gluon Plasma puts on a disguise and hides in a crowd.

RHIC at BNL A Surveillance Photo of a Collision at RHIC A single Gold-on- Gold collision as seen by the STAR experiment. Taken this month.

RHIC at BNL More Surveillance Photos A single Gold-on- Gold collision as seen by PHENIX. Taken this month.

RHIC at BNL And More Surveillance Photos A single Gold- on-Gold collision as seen by PHOBOS. Taken this month.

RHIC at BNL And Even More Surveillance Photos A single Gold- on-Gold collision as seen by BRAHMS. Taken this month.

RHIC at BNL Debriefing: The Evidence So Far... The RHIC hide-out draws a large crowd of particles. We count more than 5000 particles produced in each head-on collision! The RHIC hide-out’s thermostat is set very high - the QGP likes it hot. The temperature of the hide-out has been measured to be 2 trillion degrees Celsius, or 100,000 times the temperature of the sun!

RHIC at BNL Debriefing: The Evidence So Far... The hide-out is beginning to look like the early universe - a known QGP hide- out. We see almost as much anti-matter as matter. We may have already caught a glimpse of our suspect! The picture is still fuzzy, but more data should clear it up.

RHIC at BNL Processing the Data as we speak! Racks of Personal Computers (running LINUX) Tape Robots for Data Storage Includes 1,200 individual CPU’s! Disk storage equal to 5,000 home PC’s (50,000 GigaBytes)! If we were to put each year’s worth of data on floppy disks, we could pave all lanes of the LIE from here to New York City with them!

RHIC at BNL The Pursuit of the Plasma Continues RHIC is taking data right now! The detectives are busy sifting through the data. Our suspect is still at large. Stay tuned for more news soon...

RHIC at BNL The RHIC Hide-0ut: Drawing a large crowd Data Taken June 25, A grazing collision

RHIC at BNL Data Taken June 25, A Head-on Collision The RHIC Hide-0ut: Drawing a large crowd

RHIC at BNL In the Early Universe, the ratio of Anti-matter to matter was about 1.0. Anti-matter/matter s 1/2 [GeV] RHIC Au+Au The RHIC Hide-0ut and the Early Universe Increasing collision energy All 4 experiments agree!

RHIC at BNL The RHIC Hide-0ut: How hot is it? The center of the collision acts like a gas. The temperature of any gas can be determined from the velocity of the molecules (or particles).