Minutes BWS Upgrade: Electro-Mechanical Design Meeting #5 -- 4th September 2015 --
Participants: Raymond Veness, Bernd Dehning, William Andreazza, Paolo Magagnin, Dmitry Gudkov, Pierre-Jean Lapray, Nicolas Chritin, Jose Luis Sirvent Blasco
Agenda (http://indico.cern.ch/event/441464/
) :
PDF Version Here
1. Communications
- Dmitry Gudkov:
- Rust Oxidation on Bearings after BWS tests: Samples sent to MME, they´ll study the issue and possible causes.
- Optical Disk drawings (for laser treatment) sent to Dundee University, contractual issue solved.
- New samples for laser treatment (304L and Anticorodal) with different roughness, preparation is under way.
- Raymond Veness:
- Monday the documents of the new disk samples arrieved to Paul Collier.
- Disk samples will arrive soon for validation with optical system.
- New Technical student on the section, Mathew, will work on Methods for doing quality measurements on wires.
- Paolo Magagnin:
- Visited PSB 4L1, without moving magnetic components the BWS fit well and the installation may be OK.
- Proposal to insert BWS in section 11 without moving magnetic components.
- Bernd Dehning:
- RF Measurements: Tank prepared for measurements
- Jose Luis Sirvent:
- Radiation Hardness of Vacom Feedthrough already considered on design. Very short fibre optic with very few dopants, no issues with radiation at 1310nm expected.
- New optics studied and proposed for external optical system. Required dimensions communicated to Paolo.
2. Follow-up Open Actions
Responsible |
Action |
Status |
Dmitry |
Contact Jose for second disk type, dimensions of holes |
Design Complete |
MME analysis of bearing and bearing seat |
Samples sent for analysis |
Paolo |
Space reservation |
Space available (4L1 & 1L11) |
Jose |
Radiation hardness feed through and optical system investigations |
Feedthrough OK. New optics proposed |
William |
Early next week estimate if RF measurements could be next week, closing flanges needed |
on work |
Bernd |
wire holdings |
on work |
make a test planning for both setups, proto II and test bench |
on work |
3. BWS Motor: News. Dmitry Gudkov (CERN)
- Three Motor Orders placed: They´ll arrive Sept, Nov 15 and Jan 16
- Optical disk:
- Drawings finished in collaboration with Jose and sent to company for laser treatment assessment.
- Samples of different materials and surface finish proposed.Anticorodal (aluminium, bakeable??) and 304L (Vacuum)
- Remark (Anticorioidal) : If exposed to the beam, large SEY.
- Three new fixation hubs for glass optical disk ordered with 304L: 1 for proto in SPS + 2 for Lab systems.
- PSB Beam Wire Scanner mechanics Proposal:
- Option 1 (45 degrees Flange):
- Up to 8 BWS installed on 1 PSB section (4V & 4H)
- Complex fabrication process and welding
- Easier mounting/dismounting
- Mass 26.2kg
- Option 2 (Flat Flange):
- Up to 4 BWS installed on 1 PSB Section (4V on 4L1 + 4H on 11L1)
- DN250 flange used, but possibility of using a larger one to ease manipulations.
- Usage of standard flange, possibility of using the same mechanics for SPS (to check possibility).
- Simpler vacuum tank
- Complex process for mounting/dismounting the device (maybe guides needed)
- Mass 16.9kg
4. AOB
- William´s discussions with Jean-Pierre from the workshop:
- Both designs of option 1 (one proposed by Nicolas, one by Paolo)are possible to be fabricated.
- Option 1 requires a special welding procedure and pieces fabrication process needs to be performed.
- For option 1 some pieces, as they are on the current design, need to be modified to be possible to fabricate.
- Many sources of stress need to be considered with Option 1.
- Proposal of an unified design of BWS for PSB and SPS using Option 2
- The integration of Option 2 with SPS needs to be verified (longer forks, different flange)
- An adapter flange could be used to fit the PSB BWS version in SPS.
- Mounting/Dismounting process of PSB BWS (Option 2):
- The different steps are complicated to perform by hand without breaking the wire or damaging the optica disk.
- Disk should be protected, a disk "protective jacket" needs to be included on the desing.
- Movement steps need to be guided by a rail system to ensure extraction and insertion of scanner safety.
- Need of crate for manipulations.
- Decissions:
- Continue investigations on Option2
- Try with DN273 flange, check improvement on space for mounting/dismounting
- Check an adapter flange for SPS and make an integration study of SPS forks.
- For efficiencyonly one person will manage the design of the optical position sensor mechanics (Nicolas Chritin)
6. New Actions
Responsable |
Action |
Jose |
Order new Viewport and Lenses for external optics system validation |
Prepare Next meeting (17 or 18 th Sept 2015) |
Nicolas |
Include protection mechanics for disk |
Deeper study on Option 2 for easier mounting / unmounting (bigger flange) |
Check Integration with SPS, adapter flange, longer forks... |
Topic revision: r3 - 2015-09-08
- unknown