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
Responsible |
Actions |
Jonathan |
- Check SPS scanner wire temperature (current or resistance) measurements posibility on parking position without scanning.
- Provide motor tests results (when tested)
|
Jose |
- Test both metallic disk samples with laser engravement (once both samples are available)
- Study interferometry problem, check possible solutions with few modifications.
|
William |
- Check SPS calibration bench size to be re-used with the PSB tank
|
Bernd |
- PS wire scanner code to Dmitry.
- Check losses situation on ring #2.
- Send Functional specifications to Jonathan, Dmitry and Jose.
|
Dmitry |
- Presentation on installation tooling
- ECR progress
- Check AL oxidation and reflectivity with time
- Fork design update (wire fixation?)
- Larger hole from opposite side foreseen. Check drawings.
|
Topic revision: r2 - 2016-04-22
- unknown