# Presentation: 541279

## SSD Operations

- August 20, 2007
- H. Matis for the SSD group

- H. Matis

- STAR Operations Workshop 2007

## Key Active People this Year

- France
- Christophe Renard
- Stephane Bouvier
- Gerard Guilloux
- Jonathan Bouchet
- Artemious Geromitsos
- Jerome Baudot
- David Bonnet

- US
- Michael LeVine
- Jim Thomas
- Vi Nham Tram
- Howard Matis
- Poland
- Jacek Plebanek
- Radoslaw Pieniazek

*I hope I have not left someone out*

- H. Matis

- STAR Operations Workshop 2007

## SSD Timetable

- H. Matis

- STAR Operations Workshop 2007

## Tasks

- QA, filtering, calibration
- Repair and maintenance
- Upgrade cooling
- L2
- Readout upgrade
- Slow controls
- Runtime operations
- Reinstallation
- QA monitoring

- H. Matis

- STAR Operations Workshop 2007

## QA, filtering, calibration(urgency 1 - now)

- Tasks
- Run filtering
- HV shifts
- Alignment
- Cluster detection
- People
- Jonathan (graduating)
- Artemious
- Jacek
- Radoslaw
- Need post doc leading this effort
- Continuity when detector is used again
- To do (when detector is reinstalled)
- Improve QA information so that they are easy to understand

- H. Matis

- STAR Operations Workshop 2007

## Repair and Maintenance(urgency 1 - now)

- Several ladders are broken
- Ladders need to be checked and broken ones repaired
- Repairs must be done at Nantes
- People
- Stephane
- Help from Michael, Jim, and I
- To do
- Create a test bench at BNL for inspection
- Need BNL tech - 20% FTE to learn system, diagnose and repair
- Assemble parts inventory
- CAEN power supply “flakey”
- Repair or spares - lower priority

- H. Matis

- STAR Operations Workshop 2007

## Upgrade Cooling(urgency 2)

- Scenario I –  October 1
- 1/4 FTE designer for new cooling system
- Transfer SVT slow controls system to SSD
- Slow control group
- Install cooling interlocks
- Scenario 2 - Next year
- Cooling done as part of HFT installation
- Need to relate slow control interface to SSD interlocks

- H. Matis

- STAR Operations Workshop 2007

## SSD Readout Upgrade(urgency: 2     start 11/2007)

- Upgrade electronics Design of new readout
- Must be sensitive to DAQ1000
- STAR needs to define triggering requirements
- Personal for upgrade
- Christophe (Nantes) 0.75 FTE-yr
- Michael 0._x0005_5 FTE-yr
- Digital electronics engineer (BNL - TBD) 0.75 FTE-yr
- Software to decode_x0005_ new data format
- Michael L. 0.1 FTE-yr

- H. Matis

- STAR Operations Workshop 2007

## L2 upgrade and fix(urgency: 2     Implemented before DAQ occupied with data taking)

- SSD crashes with L2 trigger
- Large amount of data needlessly sent to be compatible with existing code
- Only needed for scenario 1
- People
- Michael - 2 months
- Christophe
- STAR DAQ person for diagnosis

- H. Matis

- STAR Operations Workshop 2007

## New SSD-specific slow controls(urgency: 2  start 3/2008)

- Replace EPICS/VxWorks with Linux version
- Can no longer support SUN-based system
- New presentation required for new readout architecture
- David Bonnet did excellent job in pass
- Need new 1 scientist FTE-yr (TBD)  [both tasks]

- H. Matis

- STAR Operations Workshop 2007

## Runtime Operations(urgency: 2  start 8/2008 or 9/2009)

- Run 7 -  3 people/week - 2 FTE/week
- Run 7 crew
- Michael, Jim, Vi Nham
- Jonathan, Artemious
- Jerome (in France)
- Did not train “super” expert
- Need one leader for the runtime operations group
- Knows all whims of the detector
- Resident at BNL

- H. Matis

- STAR Operations Workshop 2007

## Reinstallation(urgency: 2  start 8/2008 or 8/2009)

- Reinstall detector and test - One month
- Installation
- Stephane
- Gerard
- BNL Tech
- Testing
- Christophe
- Train runtime crew

- H. Matis

- STAR Operations Workshop 2007

## QA monitoring(urgency: 2  start 8/2008 or 8/2009)

- Need instantaneous online monitoring
- Helps to understand the SSD behavior (HV, reboot of the Slow Control...)
- And to take action if needed
- Need to revisit the current plots (less but relevant):
- 2D occupancy plot
- (#SSD hits/#global tracks) distribution
- SSD hit vs. phi
- Plots for shift crew or SSD expert
- QA did not work well in Run7
- Need real-time monitoring
- Implementation : 1 FTE for ~1 month

- H. Matis

- STAR Operations Workshop 2007

## To do Scenario I or 2?(urgency 2 - decision by January 2008)

- Does the SSD hurt or help the low mass run?
- Does it separate non-photonic electronics from background?
- SSD is used to calibrate the TPC
- How important is this?
- Need analysis by working groups of pros and cons of having it in
- Installation and cone design
- Path of upgrades
- Is upgrade funding available
- Longer the SSD out, the more institutional memory lost
- Decision needs to made by management by say January 31, 2008

- H. Matis

- STAR Operations Workshop 2007

## Homework for SSD Group (urgency 1 - Completed by October 2007)

- Need to write short proposal
- Jim and I
- Describe in detail how to update SSD
- Memorandum of Understanding
- Michael and Stephane (Christophe)
- Between STAR and SUBATECH
- Formally establish collaboration in DAQ1000 era

- H. Matis

- STAR Operations Workshop 2007

## Summary

- This year assembled a good team
- Strong support from the French
- Need to transfer center of gravity of support to North America
- significant training and a “Blair” for the detector
- STAR management must establish when the SSD will be reinstalled
- Establish formal structure for the group with institutional responsibilities
- Upgrade path must be specified
- Need money, engineering and tech support
- Many key personal are graduate students, postdocs
- French support will not increase
- Need to identify positions and funding for hire
- Excellent project for small university group to join and provide significant contribution
- Any volunteers?

- H. Matis

- STAR Operations Workshop 2007