Minutes BWS Upgrade: Electro-Mechanical Design Meeting #10 -- 21th April 2016 --

Participants: Raymond Veness, Bernd Dehning, Federico Roncarolo, Jonathan Emery, William Andreazza, Dmitri Gudkov, Jose Luis Sirvent

Agenda ( https://indico.cern.ch/event/522821/ )

PDF Version             Bernds_Notes

1. Communications

• Review last meeting (17/03):
  • Jonathan presented the electronics status and the schedule for next year.
  • Ray show a general presentation on the PSB scanner. 6 weeks scheduled BWS testing (Vacuum, RF...)
• Follow Up meeting (22/03):
  • Motor controller and "Intelligent Drive prototype" physically shown.
  • Some investigations are required to check in which direction to go with "Intelligent drive".
  • Decission to take on:
    • Usage and adaptation of VFC board for this pourpose
    • Design of a custom and project specific board.
    • Report on brief summary to help in decission.
• News:
  • Cost estimate for all production, installation and all equipment required.
  • ML will present in August.
  • PS installation to be done in 2017/18, cell 54.

2. Open Actions Check-list (B.Dehning)

• Feedthrough for RF antenna: (DONE)
  • Offer received and in contact with company that will provide Feedthrough (Dmitry)
  • Discussion with Fritz, and feedtrough accepted. (Dmitry)
  • This feedtrough comes from a request from a RF Meeting 6 monts ago (Raymond)
  • RF simulations are not foreseen, in some cases are not as reliable as spected (Raymond)
  • Reason: This antenna will rick-up RF to avoid wire breackage due to RF heating.
  • Is there any measurement on the wire heating for the new BWS in parking position? (Federico)
    • There is a measurement of the current induced on the wire due to the beam crossing. (Jonathan)
    • Also the wire resistivity is measured.(Jonathan)
    • However these measurements are triggered by a movement(Jonathan)
    • There is no gating on the system measurements since there is memory enough, our dedicated system could allow us to add some more functionalities.
• Viewport Drawing Check: (DONE)
  • Drawing is finally OK.
  • Nicolas assured that to be mounted on this configuration is not a problem.
• ECR for PSB (Ongoing):
  • Discussed with vacuum group.
  • Preliminary designs approved.
  • Discussion on SEM grid placement and why usage of the same ring (#3) for both equipments (Federico):
    • BWS placed upstreams SEM grid.
    • Intervention splitted on 3 phases (William)
    • The idea is to touch always same pipe (William)
    • Remark on spacing for Scintillator system (Needed to foresee space for this)
    • If SEM grid and BWS are swamped maybe there'd be more space for Scintillators.
• Wire fixation on fork (Defined):
  • Fixation system defined and presented on BI day by Dmitry ( see here)
• Needed to check AL reflectivity loss with time, oxidation (still unclear)
• Motors testing (Ongoing):
  • Aim: Confirm specifications and check if they still fit for our system with the custom rotor.
  • Started some preliminary testing.
  • Some tuning required on the controller system.
  • New rotors will be ready May-June.
  • Jonathan requires to work 100% on this during at least 1 day.
• Disk vibrations simulations (To be done)

3. Mechanics: Status Update (D.Gudkov)

• Vacuum Compatible Rotor (Alxion) tests:
  • Bake-out at 235degrees.
  • Outgassing is OK.
• Motor orders:
  • 3 Vac. Compatible motors ordered and waiting for approval.
• Metallic encoder disks samples:
  • Two samples ordered
  • Surface diamond machined
  • Two possible laser engravement (Lasertec and Dundee Univeristy)
  • Dundee University sample available next week.
  • Jose will test both samples same day (next week).
• Real size encoder disk:
  • Tooling for testing it on test-bench is being produced.
  • Production in end of May.
  • Material received in April.
• Production status:
  • Production started: 3 machines + 2 tanks.
  • Drawings approved and cost estimate 75 kCHF (not including raw materials)
  • Big viewport included for inspection.
  • PSB mounting tooling almost done.
  • Support "table" for PSB prototype already prepared.
  • Mock-up model will be built on laboratory for mountint/dismountint training.
• Special pieces for motor / resolver and encoder systems needed to be ready on August ( Place orders ASAP!! )
  • Foreseee orders for 3 PSB machines
• Integration Study:
  • Nicolas Chritin will be involved on this for PS and SPS.
  • Required BC for starting the job
  • Good to start with PS (Raymond)

4. AOB

• Calibration Benches
  • Aurelie will be strongly involved on the Optics review and re-design if required.
  • Calibration benches needed:
    • Calibration bench #1 SPS proto:
      • To be placed on 867, mounted on SPS BWS. Mechanics already on the lab.
      • Operational calibrations
    • Calibration bench #2 SPS Squared frame:
      • To be placed on 865 Laboratory, mounted on table with some reference point with respect to squared frame.
      • Gain experience and testing pourposes
    • Calibration bench #3 PSB proto:
      • To check if possible to reuse any of the previous or do a custom design (William).
• Functional specifications for PSB are required to be communicated to Jonathan and Jose.
  • This is essential to schedule BWS functionalities and acquisition system considerations.
  • Memory scaling and FPGA programming of both systems need to be adapted to these specs.
• Cabling and Installation infraestructure:
  • The installation of a Rack for fibre optics needs to be taken into account for integration (Jonathan)
  • The distance of the Rack with respect to the PSB BWS Machines is not critical (few meters are not a problem)
  • Cabling for PSB location already prepared by Jonathan.
    • Jose would like to check see if some cable for acquisition system proto are missing.
    • No Multimode fibres on PSB locations.

5. Actions