Wire Scanner and Collimator Meeting Minutes, May 2, 2006

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Contents

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Attendees:

James Bong,

René Correa (absent),

Tim Montagne,

Tom Porter,

Patrick Krejcik (absent),

Doug Murray

Hamid Shoaee

 

 

Agenda:

  1. Review previous actions.
  2. Procurement; what needs to be ordered
  3. Review status.

Previous Actions:

  1. Doug will determine if BC1 motion readback can be isolated to specific positions.

New Actions: (summary; see details below)

  1. James will order the remaining motion control equipment for injection commissioning.
  2. Doug will request 4 ethernet ports for collimator and beamline motion testing in Bldg 26.

Minutes:

  1. Previous actions:
    1. Doug spoke with Paul regarding the area of BC1 requiring the greatest resolution.
      1. Ideally, if only a small part of the total travel distance requires high resolution, we were hoping to use Tom's idea for tandem, high and low resolution LVDTs.
      2. Paul said that 16 cm of the total 30 cm of motion required highest resolution. He also said this resolution was 250 µm.
      3. A quick calculation on Tom's part tells us that a single, large LVDT will have enough resolution across the entire range of motion for BC1.
  2. James prepared a list of outstanding items that need to be ordered.
    1. The list included equipment to instrument 10 motors; 7 sets of wire scanners, 2 collimator jaw motors and the BC1 articulating beamline motion.
    2. The list includes: ||| Part Name || Channels Supported | Need to order

Highland Technologies V550 LVDT Conditioner | 8 | 3
SLAC 8 CH LVDT Breakout Chassis | 8 | 2
Hytec 8601 Motor Controller IP card | 4 | 4
Hytec 8002 IP carrier | 16 | 2
Hytec 8906 VME Transition Board | 16 | 2
DB50 (SCSI) cable from 8304 to 8906 | 4 | 2
Hytec 8906 breakout chassis | 4 | 4
Hytec SMDS4 Motor Driver Chassis | 4 | 4
Hytec SMDS4 to 8906 interconnect cable | 4 | 4
Power supply module | 4 | 4
power supply rack | 12 | 2
SLAC 125-433 10 CH resistor Chassis | 10 | 1
Caen V965 Charge integrating ADC | 16 | 1
SLAC 135-133 8 CH HV distribution Chassis | 8 | 2 ||

    1. The laser heater motion required for the undulator gap will not be required until late 2007.
    2. James will order the remaining equipment required for injection commissioning as soon as possible, with the exception of the Caen ADC; Bob Fuller will order that as part of a larger order. ^ Action: James will order the remaining motion control equipment for injection commissioning. ^
    3. Doug asked to check that we have enough connectors for everything, including SCSI-II, lemo and others.
      1. James mentioned that each wire scanner also needs a 22-pin Burndy Trim Trio connector.
      2. There was some discussion about the merits of changing the connections with the new wire scanner designs, since we're using a subset of those 22 pins.
      3. Tim mentioned that the design work and drawings are already complete, and although it would be a simple task, there's nobody free to do it.
      4. We agreed to stay with the existing connector designs for now.
    4. The order for photomultiplier tubes, bases, flexible PLIC-type cable, gas distribution equipment and more needs to be specified and reviewed separately.
    5. Tom mentioned that he would be ordering all of the motors, including those for contingency and test purposes.
    6. Tim confirmed that his assembly plans for the collimators and wire scanners include LVDTs, and we need not order more.
  2. We briefly reviewed status and discussed outstanding concerns.
    1. James and Tom met with Leif last week to discuss the BC1 schedule milestones.
      1. BC1 finishing and testing will occur in Bldg 26. We will need ethernet ports there. ^ Action: Doug will request 4 ethernet ports for collimator and beamline motion testing in Bldg 26. ^
    2. Tim reminded us that the BC1 collimator mechanical design review has not been held.
    3. Tim also reminded us about a new wire scanner drive mechanism for a Beryllium foil target drive on BC2.
      1. It will behave more like a collimator, since a downstream OTR will be used to measure the profile after collimation.
      2. He expects it to have the same resolution and drive requirements as a wire scanner.
    4. Tim mentioned that vacuum chambers for some of the initial wire scanners arrive this week, so assembly will start at SLAC very soon.
      1. He said we might be able to expect a wire scanner assembly in late June.
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