Los Alamos National Laboratory Heavy Ion Program 1. Dave Lee Heavy Ion Program
Kilday, Gregg, Film Editor has reference to this Academic Journal, PHwiki organized this Journal Los Alamos National Laboratory Heavy Ion Program 1. Dave Lee Heavy Ion Program 15 min 2. Mike Leitch pp, dAu 30 min 3. Pat McGaughey AuAu 30 min 4. Dave Lee Silicon Upgrade 15 min PHENIX South Muon Arm – 2001 North Muon Arm – 2002 MVD 2002 Phenix Muon in addition to MVD Program Major Institutions Muon Los Alamos National Laboratory Oak Ridge National Laboratory PHENIX France Riken, Kyoto Korean Universities University of Colorado, UNM, NMSU MVD Los Alamos National Laboratory Yonsei University
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Los Alamos Heavy Ion Program Current Personnel Muon Spectrometers Barnes, Brooks, Burward-Hoy, Kunde, Lee, Leitch, Liu, McGaughey, Moss, Norman(New Postdoc), Sondheim, Sato(New postdoc) MVD Sullivan, van Hecke, Boissevain Magnet Design in addition to Simulation Sondheim Silicon Upgrade Kunde, Lee, McGaughey, Moss, Sullivan,van Hecke Total staff support = 5.5 FTE , 1.7 Postdoc Los Alamos Heavy Ion Program Past Accomplishments Muon Arm Construction installed South 2001, North 2002 MVD construction installation complete 2002 Run 2 data taking (2002), pp muon analysis, paper submitted to PRL Run 3 data taking (2003), dAu muon analysis 2 QM04 invited talks, Brooks(plenary),Liu(parallel) Analysis tools in addition to software developed Silicon vertex upgrade initiated, LOI written, proposal started Routine Maintenance of detector systems Host of Muon Workshop very successful, 50 people PHENIX The Muon Spectrometers South Muon Arm prior to run 3 in retracted position. Visible is station 1 in the front of the magnet in addition to the MuID panels to the left. North Muon Arm prior to run 3 during the installation process. The scaffolding used to install the electronics is visible. South Muon Arm North Muon Arm
PHENIX The Muon Cathode Strip Detectors Station 2 Station 3 Largest CSC chambers in operation, 3.3m x 3.3m. 2 gaps using honeycomb technology Largest etched foil CSC in operation. 3 gaps as long as total radiation length ~ 8.8 x 10-4 South FEE Electronics Station-3 ~ 45,000 channels total in North in addition to South < 3000 electrons noise level Fully pipelined Fiber optic output PHENIX MVD half cylinder be as long as e run 3 Complete MVD prior to installation as long as run 3. Visible are the strip detectors in addition to kapton cables (red), the cooling plenum (white), in addition to the power in addition to control boards (green). The pad detectors are mounted in the end plates. Los Alamos Heavy Ion Program PHENIX activities Detector Council Members: Sullivan(MVD), Brooks(past muon), Leitch(past muon), McGaughey(past muon) Subsystem managers: Lee(muon mechanical), Mischke(Electronics) Executive Committee: Leitch, Moss(past) Institutional Board: Barnes Physics working groups: all, Brooks(heavy convenor),Sullivan(past hadron convenor) Paper writing: Brooks(ppg017),Burward-Hoy(ppg009,ppg021), Leitch(ppg011), Silvermyr(ppg001,ppg019), Sullivan(ppg021,ppg026), van Hecke(ppg009) Internal paper review: Lee(IRC014,IRC024),Silvermyr(IRC028), van Hecke(IRC021) Data Production Manager: Silvermyr(run03) Period coordinator: Leitch(run03,04) PHENIX Online Documentation: van Hecke Upgrades proposal: Kunde, Lee, McGaughey, Sullivan, van Hecke Integration Engineer: Sondheim(muon), Boissevain(MVD) Los Alamos Heavy Ion Program Future Research Goals, FY05 in addition to beyond Examine the suppression/enhancement of J/y production in Au-Au collisions from PHENIX Run-4 data relative to scaled yields from p-p in addition to d-Au. Study the rapidity in addition to pT dependence to determine whether or not a quark gluon plasma is as long as med. Extract open charm production in Au-Au collisions via single muon, dimuon, in addition to possibly electron-muon channels to help disentangle J/y suppression due to the QGP from nuclear medium effects. Study gluon shadowing, parton energy loss in addition to the Cronin effect in d-A in addition to p-p collisions. Measure , K in addition to heavy flavor production at as long as ward rapidity via their decays to muons. Determine the particle multiplicity in addition to reaction plane in Au-Au collisions at as long as ward rapidities using the endcaps of the MVD. Per as long as m R+D as long as a silicon vertex detector upgrade. Begin design in addition to construction of the detector mechanical structure in addition to a silicon Endcap detector. Calculate theoretical open charm production cross sections using the color-octet in addition to color- singlet models. Silicon Tracker Upgrade Mechanical Concept Modify FPIX2 Conceptual layout Physics extension of the present Muon Arms by clearly identifying the heavy quarks Enhance the single muon ef as long as t by identifying decay hadrons on event by event basis Silicon Tracker Upgrade Physics Topics Gluon Structure function in protons over large x by measurements of open c in addition to b in polarized pp reactions Measurements of shadowing in nuclei by heavy quark studies in pAu reactions Advanced studies of the QGP as long as med in AuAu reactions Wide range in pt Determine yields in open charm in addition to beauty to establish any enhancement in pre-equilibrium phase Measure J/psi/open charm ratio to clearly observe any J/psi suppression Improved mass resolution of vector mesons Silicon Tracker Upgrade Endcap Extension Compliments the barrel section Larger Bjorken x coverage Higher total count rates Larger reach in transverse momentum Full proposal soon Silicon Tracker Upgrade Gluon Structure in Nuclei Endcap covers large range x from anti shadowing to the shadowing region Wider pt coverage Clean charm in addition to beauty Barrel alone covers a limited range Endcap covers lower x range in addition to fills the gaps in the barrel coverage Silicon Tracker Upgrade Improvement in mass resolution Silicon Tracker Upgrade Simulations Silicon Tracker Upgrade Proposed responsibilities Mechanical Structure Coordination Barrel in addition to Endcap Integrated approach extremely important LANL has experience, E789, L3, SSC/GEM, MVD Past relationship with experienced engineering team PHX chip coordination Barrel() in addition to Endcap Collaboration with FNAL (Ray Yarema) to modify existing FPIX2 chip Possible mechanical subsystem management Silicon Tracker Upgrade Mechanical Conceptual Design Studies Silicon Tracker Upgrade Proposed PHX chip by Ray Yarema Phenix Chip Layout: 2 columns 256 channels/column 3.8 mm x 13 mm = 49.4 mm2 Bump bonds on 200 um pitch 50 µm diameter bumps 512 bumps plus inter-chip bumps Simulated noise per as long as mance is < 250 electrons Silicon Tracker Upgrade Benefits of using the Modified FPIX2 chip in the Endcap ministrips Allows us to tailor strips to keep occupancy low Low noise Low power simplifies mechanics Can provide trigger, if desired Room temperature operation - simplifies mechanic Integrated bus is very attractive Possible Tower Section from Ray Yarema Wedge Assembly Idea Go to 16 wedges/lampshade to reduce the size of silicon detector pieces in addition to sub assembly size as long as better yields One wedge Silicon Tracker Upgrade Statement of LANL Responsibilities from Silicon Vertex Tracker Proposal Los Alamos National Laboratory (LANL) The Los Alamos group has established three major initiatives as long as the VTX upgrade in conjunction with our interest in pursuing new physics with the muon arms. (A) We have worked with the mechanical design group of the ATLAS silicon tracker, HYTEC, Inc, to develop a concept as long as the mechanical structures as long as the integrated (barrel in addition to endcap) design of the fully completed vertex tracker. Dave Lee, Walt Sondheim, in addition to other LANL members will continue to lead the ef as long as t to bring the concept to a fully engineered mechanical design in addition to to work closely with other members of the VTX upgrade group in addition to BNL to ensure effective integration of the detector into PHENIX. (B) LANL group has also established collaboration with the FNAL electronics group headed by Ray Yarema to modify an existing chip design to read out mini-strips of the endcap extension. Gerd Kunde will continue that coordination responsibility since it is vital to the endcap ef as long as t. (C) An ongoing simulation ef as long as t will be very important to these ef as long as ts in addition to Pat McGaughey, Hubert van Hecke, in addition to other members of the LANL team will pursue these activities. The LANL group has extensive experience with silicon detectors including, 1) a measurement of the of the B production cross section in addition to charm production nuclear dependence with a silicon vertex detector, E789, at FNAL using electronics developed by Ray Yarema, 2) implementing the SVXH readout chip as long as the L3 micro-vertex detector at CERN, 3) extensive prototyping in addition to testing in conjunction with the mechanical in addition to electronic designs as long as the GEM/SSC silicon micro-vertex detector, in addition to management responsibility as long as GEM; in addition to 4) similar responsibilities as long as the MVD. Over the next 3 years the LANL group will gradually reach a level of ef as long as t equivalent to 3 FTEs per year to be devoted to the VTX upgrade.
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