Controls Test Stand

1
Controls Test Stand
Test stand proposal document review - Dayle. The
activities can be prioritized according to which
measurements we need to do first. The first
priority are 1. Cavity BPM prototype 2. CSR
bunch length monitor Second priority 3. beam loss
monitors 4. Wire scanner motion control Third
priority 5. image acquisition Discussion on the
needs for each of these with regard to The SLC
aware IOC Timing Gated data acquisition Motor
control
2
BPM Testing

• 3-cavity BPM test at FFTB
• Down-mixed signal read into something like a
  Echotek VME card
• Needs timing triggers to tell when beam arrives
• Additional trigger to control when a diagnostic
  signal is sent to the BPM
• Need to be able to correlate the new BPMs with
  existing BPMs in the SCP
• Use SCP CRR plot when PNET and EVR available
• Record pulse id on CRR plot only?

3
CSR bunch length monitor

• Needs beam timing trigger
• Gated ADC required to read signals from
  pyroelectric detectors, lt8 channels
• Need to be able to correlate the new GADCs with
  existing BPMs in the SCP
• Standardize on GADC type(s). At least 2 types
  charge integrating and sampling.
• Interferometer will need stepping motor control
  and limit switches of mirror position plus
  readback of position.
• Use standard stepping motor and controller etc
• Position read back into GADC
• Need a method of starting and stopping a scan
• For test stand could use CRR PV
• Long term use control device (aka magnet) job
• Mirror position during the scan needs to be
  correlated with the GADC signals and with SCP
  BPMs

4
beam loss monitors

• Photomultiplier tube, at least 2.
• HV supply
• Signal readback into a GADC
• Beam timing
• Signal from GADC to be correlated with BPMs from
  SCP

5
Wire scanners

• Stepping motor control, start/stop scan
• Limit switches
• Position readback
• Data acquisition from beam loss monitors
• synchronized

6
Image acquisition

• Camera to ethernet bridge
• Beam trigger to camera for single snapshot
• Trigger to retrieve image from camera
• Client CPU software to retrieve and process image
  with the timestamp from the same trigger.