Resistive Plate Chamber Upgrade for the PHENIX Muon Arm Trigger
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Resistive Plate Chamber Upgrade for the PHENIX Muon Arm Trigger Rusty Towell of Abilene Christian Univer for the collaboration APS DNP 2010
description
Resistive Plate Chamber Upgrade for the PHENIX Muon Arm Trigger. Rusty Towell of Abilene Christian University for the collaboration APS DNP 2010. BRAHMS. RHIC pC Polarimeters. Absolute Polarimeter (H jet). PHOBOS. BRAHMS & PP2PP (p). PHENIX. PHOBOS. RHIC, lenght: 3.83 km. STAR. - PowerPoint PPT Presentation
Transcript of Resistive Plate Chamber Upgrade for the PHENIX Muon Arm Trigger
Resistive Plate Chamber Upgrade for the PHENIX Muon Arm Trigger
Rusty Towell of Abilene Christian Universityfor the
collaboration
APS DNP 2010
STAR
PHENIX
PHOBOSBRAHMS
RHIC, lenght: 3.83 km
BRAHMS & PP2PP (p)
STAR (p)
PHENIX (p)
AGS
LINACBOOSTER
Pol. H- Source
Spin Rotators
Partial Siberian Snake
Siberian Snakes
200 MeV Polarimeter AGS Internal Polarimeter
Rf Dipole
RHIC pC PolarimetersAbsolute Polarimeter (H jet)
AGS pC Polarimeters
Strong AGS Snake
Helical Partial Siberian Snake
PHOBOS
Spin Rotators
Spin flipper
Siberian Snakes
Relativistic Heavy Ion Collider (RHIC)also collides polarized protons
The PHENIX Detector
Motivation: The Origin of the Proton Spin
€
12
= 12
ΔΣ + ΔG + Lz
√s = 500 GeV polarized pp collisions Probe the quark and anti-quark spin contributions via
high momentum muons from the W bosons Need to at least increase rejection factor of muon arms
trigger by a factor of ~100. We need a trigger that is sensitive to the muon
momentum. Need to introduce timing information in the muon trigger
to reject beam backgrounds.
quark spingluon spin
orbital angular momentum
Experiment
Resistive Plate Chamber Design
Efficiency 95%Time resolution 3 ns
Average cluster size 2 stripsRate capability 0.5 kHz/cm2
Number of streamers 10 %
PHENIX RPC detector requirement Our requirements are very similar to those of the CMS end caps RPCs.Therefore we have takenadvantage of their extensive R&D efforts.
signal plane
Scope of the PHENIX RPC Trigger Upgrade and Schedule
RPC3 RPC3RPC1(a,b)
20092010 Future
Bakelite: Produced, QA, Cut and Cleaned in Italy. Completed 5/09 Gas Gap: Produced for RPC 1 and 3 by Korea University. Completed 10/9/09Frames and Signal Planes: Produced in China (CIAE).Final assembly is being done at BNL.
Flow Chart of RPC production for PHENIX
bakelite route
gas cell route
frame and parts
Korea BNL China
Italy
PHENIX RPC Assembly Area
Bldg 912N
STARPHENIX
PHOBOS BRAHMS
RHIC, lenght: 3.83 km
Factory Layout
Large Zipper Door (used for all large items)
Cosmic Ray Test Stand
Gap Dark CurrentTest Stand
Assembly Areas
Gap PressureTests Table
10/12/2009 Jeongsoo Kang11
Efficiency and Cluster Size
Noise Rate Number of strips vs. noise rate (for all 48 modules in RPC3N)
Mean value of noise rate is 0.5 Hz/cm2.Only 7 strips are over 10 Hz/cm2
Threshold is 160mV.
Design Goal
Half Octant Production
Some gaps are as small as 13 cm in places.
Narrow Gaps in Station 3
First Half-Octant at PHENIX
Moving into the RHIC tunnel
Rolling past the RHIC magnets
The First RPC is Installed
RPC3 North Installed
Summary & Outlook• The RPC trigger upgrade for the muon arms of
PHENIX is on schedule.• Extensive quality control of modules has been
completed.• RPC3N was installed in 2009.• RPC3S was installed in 2010.• First physics run scheduled to start late this
year.
