Run 11 RHIC Machine/Experiments Meeting
description
Transcript of Run 11 RHIC Machine/Experiments Meeting
RUN 11 RHIC MACHINE/EXPERIMENTS MEETING
DECISIONS
• 11/23/2010, APEX: Agreed to new APEX schedule, 12 hour sessions (0800-2400) every other week away from maintenance days.
• 2/25/2011, CNI Polarimeters Normalization: Beginning with physics store 15239, changed CNI Polarimeter analyzing power to agree with jet target polarization measurements …18% lower polarization than before.
• 4/11/2011, Switch to 18 GeV AuAu on Monday, 18 April
Decisions (cont’)
3/25/2011: AnDY Collisions (W. Fischer, L. Bland, E. Aschenauer, S. Vigdor):
(1) A. Drees will test the sequence developed to address both orbit and tune effects of AnDY at the end of a store (or multiple stores if needed). (2) When the proper functioning of the sequence is demonstrated we will go back to a 1.05e11/bunch threshold, and increase every store by another 0.05e11/bunch until we reach a 10-20% luminosity impact on STAR and PHENIX. In the event the prescribed bunch intensity is not reached during the store then AnDY should be steered into collision during the last 30 minutes of the store. (3) When the tune scan on the ramp finishes (~2 more tune to test), we will increase the store length to 10h or more, (with PHENIX/STAR concurrence), with this AnDY will have more time available after turning on.
Run 11 Plan based on PAC recommendation/ALD Guidance and 28.3 weeks cryo operation4/12/10 update
• 3 Jan, Begin cool-down to 4.5K • 8 Jan, Cool-down to 4.5K complete in both rings, preliminary setup begins• ~11 Jan, 2 ⅟2 weeks beam setup for √s = 500 GeV pp in RHIC begins.• 15 Jan, power supply work/DX training complete• 17 Jan, first successful ramp• 19 Jan, 1st maint day• 24 Jan, 1 week Ramp-up with 8 hr/night beam to experiments• 11 Feb (machine and ~experiments), begin ~10 week physics run (√s = 500 GeV pp)• 16 Feb, AGS Jump Quads in routine operation for RHIC injection• 24 Feb, 9 MHz cavity in routine operation • 7 Mar, cryo troubles, extended maintenance, 0900 hrs till 2000 hrs 14 Mar – lost 7.5 days• 17 Mar, power distribution problem, extended maintenance, 1930 hrs till 0315 hrs 20 Mar – lost 2.3 days• 28 March – 1 April, PAC 2011
• 14 April Continuing Resolution Ends, guidance to follow• 18 Apr, end 9.4 week physics run at √s = 500 GeV pp run• 18 Apr begin setup for √s = 18 GeV AuAu• 25 Apr, begin 1 week physics run (√s = 18 AuAu)• 2 May, end 1 week physics run at √s = 18 GeV• 2 May, begin 1 week setup for √s = 200 AuAu• 9 May, begin 1 week Ramp-up with 8 hr/night beam to experiments• 16 May, begin ?? week physics run at (√s = 200 AuAu)• 4 Jul, completed 26 weeks cryo operations (7 weeks 200 GeV AuAu to this point)
What’s missing :• Uranium test/physics run• Low energy test run• cryo warm-up
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STAR PHENIX ANDY X10
STAR Goal (50% Pol)
PHENIX Goal (50% Pol)
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Run 11 250 x 250 GeV pp, Luminosity2.9 mb STAR, 2.7 mb PHENIX, 2.8 mb (not right) ANDY
STAR PHENIX ANDY X10
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thru fill 15438, 11 Apr
Monday, 18 April (9.4 weeks physics)
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Pola
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Up down ramp, Blue Beampolarization with current analyzing powers
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+11.0 %
-28.5 %
+6.8%
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Asym
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Up down ramp, Blue BeamAsymmetry
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-15.0%
-11.3%
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7 April Up-Down Ramp measurementBlue Beam
Current CNI average analyzing powers are:Energy AN24 0.0144100 0.0122250 0.0147
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Up down ramp, Yellow Beampolarization (#1 only) with current analyzing powers
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+24.4 % -23.1 %
-0.4 %
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Up down ramp, Yellow Beamasymmetry (CNI #1 only)
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-13.3%
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7 April Up-Down Ramp measurementYellow Beam (only Yellow 1 was used as Yellow 2 was acting up)
Current CNI average analyzing powers are:Energy AN24 0.0144100 0.0122250 0.0147
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Run 11 Yellow beam polarization as measured with the jet target
jump quads operational for RHIC fills
4/8/2011fill 15427
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Run 11 Blue beam polarization as measured with the jet target
jump quads operational for RHIC fills
4/8/2011fill 15427
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Run 11 polarization as measured with jet target (4 fill average)
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Run 11 polarization as measured with jet target (4 fill average)
Y_Po (w/jump quads) Y_Po (w/o jump quads)
4/8/2011fill 15427
Blue average = 46.3 +/- 0.8%
Yellow Average = 46.3 +/- 0.7%
two stores
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Run 11 Source, AGS polarization (CNI), 250 GeV RHIC (jet target) (4 fill average when available)
Y_Po (w/jump quads)
B_Po (w/jump quads)
Y_Po (w/o jump quads)
B_Po (w/o jump quads)
AGS(CNI)
Source
4/8/2011fill 15427
Lmax = 170 x 1030 cm-2s-1 (projection with 2.7 mb xsection)
Lmax achieved Run 9, 85 x 1030 cm-2s-1
Physics Stores 15398 through 15442
Through 31 Mar 2011
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BNL Energy Use FY 2009-11RHIC Cryo RHIC other AGS-Exp
Booster AGS-Mach Tandem
CAD Bldg less SMD NSRL Site Base
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RHIC ON
AGS SEB/FEB
NSRL
through Feb 2011
Run 11, First overnight store, Mon Jan 24 00:12Fill number 14919,, s=500 GeV21 days since start of cool-down
20K
20 x 1011
• 28 x 27 bunches• b*=0.65 meters
For peak store lumi = 170 x 1030 cm-2s-1 (projected MAXIMUM)ZDC Rate ~ 400K (assuming 2.4 mb n-pair xsection)
Run 9, First overnight store at s=500 GeV22 days after start of cool-down
• 56 x 56 bunches• b*=0.7 meters
40K
40 x 1011
26 weeks
http://www.bnl.gov/cad/esfd
AGS-Booster-Tandem/Linac/EBIS Startup
RHIC Cryo Cooldown to 45 deg K
RHIC Cryo Cooldown/Warm-up
RHIC Cryo Operation
RHIC Cryo off
RHIC STAR & PHENIX
RHIC Research with s = 500 GeV pp
RHIC Research with s = 200 GeV /n AuAu
RHIC Research with s = 192 GeV /n UU
RHIC Research with s = 18 GeV /n AuAu
RHIC Drell-Yan Test (2:00 IR)
Low Energy Au test(?)
Particle Accelerator Conference
NSRL (NASA Radiobiology)
BLIP (Isotopes)
BLIP (other)
Shutdown (RHIC)
C-A Operations-FY11
Program Element Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep
FY 2011
26 Jan 11
setup with beams
Sep
concurrent with RHIC
ramp up luminosity
5 Oct
28.3 weeks
3Jan
24 Nov
setup as required
10 weeks physics
10 weeks
8 weeks
.4 weeks
planned (budget permitting)
NSRL 111B actual schedule to be determined
11A 11B10C
20 Jul
RHIC Schedule subject to change
10 Jun
1.5
15 Mar 20 May
Run-11 Au-Au luminosity projections 100 GeV/nucleon
Wolfram Fischer 28
Assume 6 weeks to ramp-up for min, and 8 weeks for max (stoch. cooling re-commissioning).Expect Lavg up to 25x1026cm-2s-1 (+25%).
[from Run-10 to max: b* = 0.75 0.65 m, Nb = 1.1 1.1x109, more cooling]
PHENIX Goal (0.7 recorded)
?? (complicated)
STAR Goal (TBD)
Goals to be updated/corrected