7 Jan 03 CFT+PS Weeks in Review Sequencer status –1553 communications issues may not be fully...
-
Upload
tyrone-harvey -
Category
Documents
-
view
213 -
download
0
Transcript of 7 Jan 03 CFT+PS Weeks in Review Sequencer status –1553 communications issues may not be fully...
7 Jan 03
CFT+PS Weeks in Review• Sequencer status
– 1553 communications issues may not be fully resolved
– scanning still off
• Calibration – calibration database complications continue
– procedure updates in progress
• AFE related issues– continue effort to eliminate individual link problems
– largest SIFT to SIFT gain variation board extracted
– crate x51 VRB download challenge
– isolate lower ground clips in attempt to reduce noise
– timing studies
– quiet time zero threshold data • tick studies
– discriminator threshold reduced from 1%+1pe to 1%
• Refrigeration issues– 7A5 and DB7 heaters essentially off
– east cryostat cold block temp reduced to 5.50K
– west cryostat cold block temp reduced to 6.3K as test
7 Jan 03
CFT+PS Weeks in Review• Trigger
– slot 46 link problem due to sequencer backplane• modified AFE boards installed to address problem
– new CTTT firmware reports inclusive and/or terms– new transition boards installed– CTOC sender firmware updates– six of eight octants appear to be reading out properly– CTT examine
• CPS– Calibration studies in progress
• FPS – LED pulser studies of waveguide routing– map updated
• FPD – north sequencer power supply swap– FPD sequencer installed– VRB installed in crate x52– an (improper flavor) AFE board installed– electronics database updates ready
7 Jan 03
Dmitri’s Info on Shutdowns• 3.5 week shutdown in January
• Shutdown starts during owl shift Monday 13 Jan– store terminated at 2200 12 Jan 2003
• Lab wide power outage 0700 to 0730 Monday 13 Jan
• Cooling water restriction Monday and Tuesday 13 and 14 Jan will limit platform operations
• Cryostat warmup begins 0700 Monday 13 Jan
• Another lab wide power outage currently scheduled for 0700 Friday 17 Jan
• Cryostat cold again on Saturday 25 Jan
• Limited access from Friday 31 Jan on...
• Search and secure ends shutdown on Tuesday 4 Feb
• Tevatron turn on Wednesday 5 Feb– first low luminosity store on Friday 7 Feb
• Six week shutdown tentatively scheduled for July-August 2003
– starting ~28 July
– anticipate two week startup
7 Jan 03
Pre-Shutdown Studies• CTT commissioning• Discriminator studies• Timing studies• FPS map issues• DB7 mystery• Firmware status• FPD readout commissioning
• Performance versus crossing number• Noise Issues?• Efficiency studies
• Tick and turn studies
• CPS gains• FPS performance?• FPS bias distribution• optimize pedestal location for dynamic range?• new discriminator scan procedure?
7 Jan 03
CFT+PS Three Week Shutdown Plans
• Warm cryostats (VLPC offline for ~2 weeks)– dilute contaminates in gas volume of cryostats– Move cassettes in cryostat?
• Sequencer backplane replacement?– cassette slot 46 link problems
• Complete personality and VSVX firmware installation• Trigger firmware installation/testing as necessary• Trigger hardware upgrades
– Transition boards– power supply
• Verify trigger cabling where necessary– investigate link issues
• Address FPS map issues• LED pulser upgrades
– additional crate and pulser boards– software updates
• Studies– discriminators– trigger– FPS waveguide certification?
• FPD readout commissioning
• Routine and repeated platform and DAQ access
7 Jan 03
CFT+PS Infrastructure• Sequencer crate 0x3 backplane replacement?• Rearrange cassette assignments?
– Move cassette in slot DB7?– Move cassettes in east cryostat?– Install cassettes in spare slots?
• Power supply issues– PS-2-B/+33V readback problem (151969)– measure backplane voltages?– calibrate Vicor voltage readouts?
– separate CFT+PS from CAL BLS supply swaps– separate CFT+PS and SMT sequencer power?– remote control of AC input to AFE supplies– enhanced cooling for SMT sequencers?
• AFE cooling enhancements?– Double wide air dams for special locations– tighten ductwork– north side airflow booster?– cassette dummies in open slots?– Air filter retainers?
• Enhance protection of LVDS cable plant – LVDS strain relief?
7 Jan 03
CFT+PS Infrastructure• Crate x53 VRBC replacement• Enclose back of rack PC19• Smoke detectors on platform
– test and optimize smoke detectors
• Install table between cryostat
• Install water barrier over cryostats
• Reduce light levels on the platform?– Curtains– dark air dams
• Identify and qualify spares – grey and fiber cables– VTM, VRB and VRBC– sequencers and sequencer controllers
• Replace fan filters at end of shutdown• Verify AFE assignments• CFT environment evaluation?
7 Jan 03
AFE Issues• Sequencer firmware updates
– facilitate scanning
• VSVX firmware updates– personalities too
• Address controls issues– bias readback issues– calibration of cassette temp sensors
• Address pedestal shifts with discriminator 1% firing• Address dead channels• Address hot channels• Address SVX calibration issues• Address data integrity issues
• PIC temperature calibration for remaining boards?• Verify AFE map• Verify that all AFEs have front air baffles installed
• What about low resistance AFE boards?
7 Jan 03
AFE Issues• VLPC pixel breakdowns?
• Bias and Temperature Stability
• PIC temp calibration
• Bayonets– lubrication– red LEDs/missing LEDs
• AFE 1B5 module 3 temperature readback at 8.9K– 26 Sept 02 (130024) even after board was replaced
• AFE 3A0 (480) check VSVX firmware– problems reading out VSVX in slot 5A0
• AFE 6A5 module 8 slow temp control response – 29 Nov 02 (154974)
7 Jan 03
FPS and LED Pulser
• Address FPS mapping issues
• Address FPS temperature control problems
• FPS pulser cable re-termination
• FPS waveguides tests
• LED pulser upgrades– robustness
– software update
– install additional crate
– install additional LED boards
– power supply installation upgrade
– LED balancing
– Decouple CFT from FPS
– Communication to control station
7 Jan 03
CTT
• Resolve cassette slot 46 link issues
• Resolve CPS link issues
• Complete installation of new Glink transmitters
• Complete power supply upgrades
• Complete personality installation
• Strain relief for LVDS cabling?
• Verify LVDS cabling
• Link tests
7 Jan 03
Warm Cryostat?
• Install cassettes in slots 1, 3, 101 or else install baffles in those slots
• Cassette in slot 30 has loose retainer on upper PC mounting rail
• Cassette 67 (slot 11) LH mounting rail retraction failure 70846
• Few individual pixels suffer from breakdowns
7 Jan 03
Other Ideas?
• CFT environment evaluation?– Purge gas
• replace transformers on SEQ for 1553?– Improve reliability of 1553 communications
• Unused AFE channels --smaller caps?
• AFE readout speed upgrade to 53 MHz?
• Commission spare slots?
• Re-route SEQ grey cables at SEQ backplane to improve access for diagnostics
• Re-organize VRB crates to equalize loads?