Target meeting: 05Nov08, 09:00

Present: JT, AN, KL, PH, CB, RN, DK, AD

1. Review of actions:

• PH: Take damaged shaft to TechVac to show them failed coating and to solicit feedback.
  Shaft would have come to RAL for 'transmission' on Tuesday but for illness.  Agreed that a visit to TechVac would be made by PH, EMcC, and JT.  The three of them would coordinate date/time for their own convenience.
   
• AN: Contact the 'owners' of the vibration analysis setup at RAL.
  AN hadnt done this yet, JT agreed to take action.
   
• KL: Provide upload link for the next meeting.
  Stands
   
• KL: Discuss with JR at post explanation of plots.
  Stands.
   
• All: Send proposed dates for target workshop and preferred venue.
  KL to organise target w/s.
   
• RH: make inventory of components available for present target system.
  Done, had been sent, KL to post inventory with notes on meeting.  Principal issue is that there is only one set of control electronics.  Need to work towards an operating system in ISIS, R78, and Sheffield.
   
• CB: Make costing and plan for an additional control circuitry set up.
  Stands.  Awaits PS's return from sick leave.
   
• PS, PH, AD: Calibrate position and beam-loss response in time for next running period.
  Stands.  Will be done this week.
   
• AD, DK, CMacW, JL: Make it possible to read out the beam-position monitor signal in time for the next running period.
  Stands.  Signal has been provided to MICE by D.Wright.  At MICE end there is a need for some signal processing.
   
• PH: Coordinate target real-time s/w system and arrange discussion between contributors (JL, P.Hanlet) asap .
  Stands.  Now an agenda item so this action item will be dropped.

2. Progress on magnetic measurements

• Stator: CMacW:
  Measurements of stator continued with new grounding scheme today.  Noise still observed.  CMacW will continue to pursue the measurements, but, we should decide what to do in the longer term, at next week's meeting.
   
• Permanent: PH:
  Kept for eventual QA.

3. Progress on mechanical design: JT

JT presented the schedule he had prepared for the investigation of coatings, target-shaft redesign, build, and installation.  End date (May09) a little late.  Important to try and advance this.

Discussion of shape of target shaft concluded by confirming previous design: hollow cylinder with a flat to stop rotation.  We also discussed the shape of the target blade.  It would be convenient if the shaft could simply extend into the beam.  This should be investigated in s/w.  We agreed three actions: JT will send AN the dimensions of the shaft; AN will seek to simulated the pipe-shaped shaft in Orbit; and MA will seek to simulate the pipe-shaped shaft in G4BeamLine.

JT commented that tungsten disulphide might be an appropriate material and noted that it had the advantage that it was applied at room temperature.  JT will continue investigations as to its chemical and radiaological properties.

PH et all had made initial investigations of shaft motion with the high speed camera.  Shaft is observed to 'kick' or 'flap' at the end of the stroke.  JT suggested moutning an accelerometeer.

Assuming that the results of the target observations with the high-speed camera indicate that it is worthwhile, we agreed to seek a retrofit of vibration damping the target system in R78 and running a test.  The benefit of this is that if we find that the vibration damping is important then it will be possible to retrofit some vibration damping on the target in ISIS.  It is hoped that this will increase the number of dips that are allowed.

Agreed:

• Goal is to have target with vibration damping running in R78 during the first week of Dexembe (08!).

4. Progress on (dynamic) mechanical FEA: SY, WL

No report this week: FC review in Oxford.

5. Progress on magnetic FEA: PS

No report this week: PS illness.

6. Upgrading the 'user interface'

Will re-title item 'Target online software' and put PH's name against it.  PH agreed to coordinate contributions from JL and PH and to interface with JSG and the MICE DAQ.

7. Discussion

No additional items.

8. Date of next meeting

12Nov08: 09:00 -- RAL/phone

9. AoB

None

Summary of actions:

• PH, EMcC, JT: Take damaged shaft to TechVac to show them failed coating and to solicit feedback.
• JT: Contact the 'owners' of the vibration analysis setup at RAL.
• KL: Send proposed dates for target workshop and preferred venue
• KL: Provide upload link for the next meeting.
• KL: Discuss with JR at post explanation of plots.
• KL: to organise target w/s.
• CB: Make costing and plan for an additional control circuitry set up.
• PS, PH, AD: Calibrate position and beam-loss response in time for next running period.
• AD, DK, CMacW, JL: Make it possible to read out the beam-position monitor signal in time for the next running period.
• JT: will send AN the dimensions of the shaft;
• AD: will seek to simulated the pipe-shaped shaft in Orbit;
• MA: will seek to simulate the pipe-shaped shaft in G4BeamLine.