# Presentation: 590198

## 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

## 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

## 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

## 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?

## 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

## 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?

## 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?

## 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?

## 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)

## 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

## 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

## 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

## 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?