h1. Wire Scanner and Collimator Meeting Minutes, May 2, 2006
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h2. Contents
{maketoc}^
h1. Attendees:
| James Bong,			| René Correa (_absent_),	| Tim Montagne, |
| Tom Porter,			| Patrick Krejcik (_absent_), | Doug Murray |
| Hamid Shoaee | | |

h1. Agenda:
# Review previous actions.
# Procurement; what needs to be ordered
# Review status.

h1. Previous Actions:
# *Doug* will determine if BC1 motion readback can be isolated to specific positions.

h1. New Actions: (_summary; see details below_)
# *James* will order the remaining motion control equipment for injection commissioning.
# *Doug* will request 4 ethernet ports for collimator and beamline motion testing in Bldg 26.

h1. Minutes:
# Previous actions:
## Doug spoke with Paul regarding the area of BC1 requiring the greatest resolution.
### 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.
### Paul said that 16 cm of the total 30 cm of motion required highest resolution.  He also said this resolution was 250 µm.
### 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.
# James prepared a list of outstanding items that need to be ordered.
## The list included equipment to instrument 10 motors; 7 sets of wire scanners, 2 collimator jaw motors and the BC1 articulating beamline motion.
## 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 ||
## The laser heater motion required for the undulator gap will not be required until late 2007.
## 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.  ^
## Doug asked to check that we have enough connectors for everything, including SCSI-II, lemo and others.
### James mentioned that each wire scanner also needs a 22-pin Burndy Trim Trio connector.
### 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.
### 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.
### We agreed to stay with the existing connector designs for now.
## The order for photomultiplier tubes, bases, flexible PLIC-type cable, gas distribution equipment and more needs to be specified and reviewed separately.
## Tom mentioned that he would be ordering all of the motors, including those for contingency and test purposes.
## Tim confirmed that his assembly plans for the collimators and wire scanners include LVDTs, and we need not order more.
# We briefly reviewed status and discussed outstanding concerns.
## James and Tom met with Leif last week to discuss the BC1 schedule milestones.
### 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. ^
## Tim reminded us that the BC1 collimator mechanical design review has not been held.
## Tim also reminded us about a new wire scanner drive mechanism for a Beryllium foil target drive on BC2.
### It will behave more like a collimator, since a downstream OTR will be used to measure the profile after collimation.
### He expects it to have the same resolution and drive requirements as a wire scanner.
## Tim mentioned that vacuum chambers for some of the initial wire scanners arrive this week, so assembly will start at SLAC very soon.
### He said we might be able to expect a wire scanner assembly in late June.