hmpid status and ls1 plans
DESCRIPTION
HMPID status and LS1 plans. A. Di Mauro 27/06/12. 1) Review current detector issues: -- What are the current hardware problems that create data taking inefficiencies and what is the planned follow up ? - PowerPoint PPT PresentationTRANSCRIPT
HMPID status and LS1 plans
A. Di Mauro27/06/12
• 1) Review current detector issues:• • -- What are the current hardware problems that create data taking inefficiencies and what is
the planned follow up ?• During period LHC12c (149 runs,118h data taking with TPC) we had 6 CDH errors, the last one
was during run 182021, June 5). Since then we had more than 38h of data taking without errors. We are inspecting the connections of the faulty DDLs. During LS1, if the detector will be taken to the surface, faulty DDL could be replaced if necessary.
• -- Which are the rate limits of your detector and what are the detailed reasons ? • The typical dead time is 210 us in pp mainly related to the performance readout chain
(DILOGIC)
• -- We have to make sure that we are on track for excellent performance of the ALICE detector in this year's p-A run:
• The predicted p-A luminosities range from 3x10^28 to 10^29, which translates into interaction rates of 60kHz to 200kHz.
• Considering p-A multiplicities that are 3.5 times larger than in p-p this corresponds to equivalent proton rates of 210 to 700kHz. This means that our detector has to cope with the current particle rates. How can your subdetector deal with these rates ?
• We performed a test ramping up one module when V0tot was at 500 KHz, the total current wen up to 50 nA (trip limit is 12 uA). After the solenoid trip when V0tot reached 1.2 MHz all detectors were on, we had no trips (the total current per module was 0.6 uA, see next slide)
RICH-0 currents on solenoid trip (16/06/12 @ 13:23)
2) Plans for LS1: What are the planned interventions and needs at P2: -- review of the cooling system -- are there upgrades and improvements necessary ? NO -- review of the gas system -- are there upgrades planned ? NO Can we reduce the gas consumption ? It has already been reduced significantly, but we can check if some 10-20% can be gained. -- are the new cable to be pulled between the CRs and the cavern for your subdetector ? YES, 14 cables for remote programming of FPGA via JTAG -- what kind of hardware interventions are planned ? SEE NEXT SLIDES -- is there any change or extension of hardware foreseen that would need NO -- extension of the DCS (in particular more PCs) -- installation of additional network outlets -- additional rack space-- Are the currently implemented hardware interlocks sufficient to protect your subdetector, or is a review/modification/extension required. Present HW interlock scheme seems fine.
Detector parts to be repaired/replaced
• 4 “broken” radiators: – RICH3-Rad0– RICH4-Rad0 and Rad1– RICH6-Rad1
• 3 HV sectors at low V (the inefficiency has to include an area larger than the 24 pads of an HV sector, since MIPs hitting adjacent sectors, within a ring radius – or more – from faulty sector edges, will have less photons): – RICH0-HV3 (~ 1/3 inefficiency) – RICH4-HV0 (overlaps with Rad-0)– RICH5-HV1 (~ 1/3 inefficiency)
• Overall loss: (1.333+2/3)/7 = ~28.6 % • Status of CsI PC will be checked by summer student, until 2011 no or very limited ageing
was observed• 151 out of 161280 channels are masked, it is less than ~ 0.1% , but some could be
recovered by replacing the FEE card • Also DDLs which gives problems could be replaced • When opening chambers, o-rings might need to be replaced as well
Leaking radiator
Faulty HV sector
01
234
56
Can we install the yellow platform with Mini-Frame in place?
Without left-side extension
Still a small conflict with some pipes on MF, to be checked and eventually to be disconnected
Still a small conflict with some pipes on MF, to be checked and eventually to be disconnected
Estimation of timescale (for 5 modules)
Intervention could last 10 months, from Dec 2012 to Sept 2013 (LS1 ends in Sep 2014). Not included: new CsI PC (but that goes in parallel), production of new protective boxes for CsI PC, check/refurbishing of all radiator fittings in opened modules, more complex radiator validation/testing procedure, ….
ID Task Name Duration Start
1 Procurement of missing components for radiator trays (quartz plates, neoceram, fittings, supports)
6 wks Sat 01/09/12
2 Production of three radiator trays 9 wks Fri 26/10/123 Services in SXL2 and in b.581 1 wk Mon 03/12/124 Repair of cradle support: welding, paint,
load test 21 days Mon
10/12/125 Platform and support installation in UX25 3 wks Tue 08/01/136 Preparation of detector for removal 2 days Tue 29/01/137 Removal+ transport to SXL2 2 days Thu 31/01/138 RICH0 28 days Mon 04/02/139 Dismount RICH0 from cradle and
transport to b.581 3 days Mon
04/02/1310 Remove FEE 3 days Thu 07/02/1311 mount on glove-box 1 day Tue 12/02/1312 remove 6 CsI PC 3 days Wed 13/02/1313 inspection and repair of loose wire(s),
HV test with blank panels6 days Mon
18/02/1314 install 6 CsI PC 3 days Tue 26/02/1315 mount FEE, test 6 days Fri 01/03/1316 transport to P2 and mount back in cradle3 days Mon 11/03/1317 RICH3, RICH4 51 days Thu 14/03/1327 RICH5, RICH6 58 days Fri 24/05/1337 commissioning 14 days Wed 14/08/1338 Platform and support installation in UX25 3 wks Tue 03/09/1339 Transport to UX25 and installation in solenoid 3 days Tue 24/09/13
antonello
cosimo,student
jaap,pieter
yannick,mimmo
yannick,mimmo,pieter
yannick,jaap
yannick,jaap,pieter,cosimo,mimmo
yannick,jaap,pieter
paolo,student
jaap,pieter
jaap,pieter
jaap,pieter
jaap,pieter
paolo,student
yannick,jaap,pieter
yannick,mimmo,pieter
yannick,jaap,pieter,cosimo,mimmo
M E B M E B M E B M E B M E B M E B M E B M E B M E B M E B M E B M E B M E BSeptember October November December January February March April May June July August September October
Estimation of manpower Resource Name Work
Unassigned 0 hrscommissioning 0 hrs
yannick 640 hrsmimmo 448 hrscosimo 400 hrsstudent 720 hrsantonello 240 hrspieter 1,056 hrsjaap 832 hrspaolo 360 hrs
Details
WorkWorkWorkWorkWorkWorkWorkWorkWorkWork
Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct3rd Quarter 4th Quarter 1st Quarter 2nd Quarter 3rd Quarter
128h 184h 32h 56h 56h 40h 144h128h 168h 8h 144h
32h 176h 152h 8h 8h 24h32h 176h 152h 24h 96h 112h 32h 88h 8h
168h 72h40h 128h 136h 72h 176h 72h 128h 96h 64h 144h40h 24h 136h 72h 176h 72h 128h 96h 64h 24h
24h 96h 112h 32h 88h 8h
- The names are, in some cases, symbolic or ideal options, real availability has to be checked- In summary, for technical support:
- Yannick (+ Mimmo?): 100% for 2 months, then 20% for 7 months, than 100% for 1 month- Jaap and Pieter: 100% for 2 months, then 60% for 7 months, than 100% for 1 month
- Help for Cosimo in radiator production? Bari student/technician?- Help for Paolo in FEE dismounting/mounting? Me, Giacomo?