Operations Report
April 2001 Collaboration Meeting
E.I. Rosenberg
April 23, 2001
Operations Crew Changes
Run Coordinators:
Feb. 15 Mike Sokoloff → Eli Rosenberg
Apr. 13 Bill Wisniewski → Francois LeDiberder
Deputy Run Coordinator:
April 2 Sasha Telnov → James Swain
Liaison Training, etc.:
April 2 Sasha Telnov → Dick Kofler
DAQ Operations:
March 1 Shahram Rahatlou → Steve Sekula
April 23, 2001
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Run 2 Overview
• Run 2 Start Date: Feb. 1
• Injection into PEP: Feb 4
• First Collisions: Feb 12
(Energy Scan: Feb 12-13)
• Phase One (New PEPII
Tune) <March 12
• Phase Two (Return to
October 2000) >March 12
• Off-peak running: Apr. 1-3
• 2 Shifters in IR-2: Apr. 2
• 4 Shift ROD: Apr. 4-5
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4.11 fb-1
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Energy Scan Feb 12 - 13
Chris Roat
Fixed Width Fit
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Hadron Ratios
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Run 2 Integrated Luminosity
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Luminosity Determined
Using L3 and OPR
OPR/L3
L3/PEP
Christos
Touramanis
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Comparison of Run 1 & 2
Startup
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BaBar and KEK Total L
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BaBar Efficiency
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Low Points
• DCH Trips
• SVT abort diode drifts
• EMC chillers
• Hot Towers - UPC timing problems
• IFR PS Trips
• DAQ internal communication; server reboots
• CEN-BIP drop outs
• Water – rain on VESDA, AC leak on Master Crate,
condensation leak on shifters, flow to compressors for
Solenoid, rain on EMC chillers
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Rapid Response to Problems
Need to have shifters able to do
more under direction of experts:
Digital Picture Gallery of crates
in data taking mode –
“reference plots”
Requested laptops for system
experts to have remote access to
EPICS panels when not on site
April 23, 2001
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True BABAR Efficiency may be
masked by PEP Efficiency
Sat. day – Sun. owl
we collected 73.9 pb-1
Swing shift: change from
3 to 4 RF stations in HER
Owl shift: 00:15 EMC
bias shorted we did not
recover until 1:50
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PEP Efficiency
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PEP Efficiency Loses
• Loss of efficiency due to other programs
20% ESA; 10% FFTB
• PEP RF Aborts
( some running with with 3 RF stations out
of 4 ; 5th station’s PS arrived last week)
• Site infrastructure problems
~ 15 hours – PPS/MPS computer
~ 12 hours – water to solenoid
~ 16 hours – electron gun
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ROD April 4-5
• All 4 doors were opened
• DRC phototubes; HV; water sensor; Pb
• EMC ADB boards; fiber repair
• DCH gas sensor
• EMT cables
• SVT chiller GMB, abort diode studies,
chiller filters
• IFR HV Cables, HV box and connector
• DAQ/Computing repairs, upgrades
April 23, 2001
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Operational Issues
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SVT abort diodes
DCH trip points
EMC electronics
(ADBs, UPCs)
IFR HV
DAQ robustness
AFS Dependencies
Brown/blackouts
→ Sunday morning loss
of 72 EMC channels
April 23, 2001
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was at 20 µA/channel until mid-March
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Open Issues
• Solaris 7 in IR-2
• Removing dependencies on SCS (AFS, YP)
• If RF (or other) aborts continue, need to
revisit topoff strategy
• DCH new HV boards (needs 2 Days of
down)
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Shifters Needed Thru
June 2002
• Shift sign-up through the end of this year available the
end of this week or early next week
• As of June, OPR will no longer be “shift” based
• Revised institute quotas later this week
• Guidelines: 14 shifts within 2 month
New pilots start with day shifts
7 Navigator shifts then move to pilot
Liaison shifters: “IR-2 experience”
• “Gentle Introduction to Shift Taking” – tomorrow at
12:30 in Auditorium
April 23, 2001
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