Weekly SUS Meeting
Agenda & Summary Notes from February 22, 2005
Every Tuesday at 9am Pacific/Noon Eastern/5pm UK
1 Review of action items
2 Installation Fixtures Update
3 Glasgow Monolithic Workshop Action Items http://www.ligo.caltech.edu/docs/T/T050010-00.pdf
4 Design Meeting summary/comments/issues
5 Suspension modeling - MATLAB and Mathematica
6 OSEM design
7 MC Status
1 Russell, Dennis, Ken Mailand, Helena, Mark, Calum, Janeen CIT
2 Caroline Glasgow
3 Norna Stanford
4 Justin RAL
5 Rich MIT
6 Luke Florida
7 Stuart Birmingham
8 Oddvar LLO
SUMMARY NOTES AND ACTIONS FROM PREVIOUS MEETINGS
1 Document Updates
ACTION T000053 Universal SUS DRD no progress to report Dennis/Janeen 15-Feb-05 High
2 Suspension Modeling - MATLAB and Mathematica
Mark has been doing a lot of modeling, some for Hiro's end-to-end. Mark has modeled in MATLAB the blade and wire clamp components.
3 Blade Processes - creating and adopting a plan.
ACTION Blade Committee to create blade process spec. The factor of safety on the load must be revisited Blade Comm PDR Low
ACTION David asked the Blade Committee to define a uniform rationale for the stress level for the maraging steel. Blade Com. PDR Medium
4 MC @ LASTI Laurent, Rich, Calum and Norna met this morning and discussed issues related to the pitch frequencies. Next meeting March 29th.
ACTION Deliver a cleaned and baked spacer for the LASTI mode cleaner suspension to match the quad beam height Janeen quad del. Medium
5 Design Meeting
Calum mentioned that you can go to the SUS page and click on the link for pictures of the building of the quad.
6 OSEM Status
The osem 3D Solidworks design will be sent to Calum. They've gotten quotes for mechanical parts and will go out for purchase orders later this week.
7 Installation Fixtures
Concerning the action below, Dennis said that the tilt should not be a problem; the springs are very stiff. A ballpark of .024" at a radius of about the length of
the quad pendulum should be allowed. It is assumed that the quad components will be locked down during installation onto the optical table anyway. It is also
assumed that they will be locked down during installation of counter weights as well. Oddvar provided a brief summary of his work. He pulled out a course actuator
along with the drawings. The electronics are a bit complicated. If we can't use the stepper motor, we can use the manual hand wheel with precision readout for
the X & Y translations. He's still looking for drawings related to the vertical translation stage. Dennis suggests calling the stepper motor manufacturer IDC.
Dennis said that most stepper motor and lead screws were off-the-shelf. Initial FEA of the support beam show that it is satisfactory. He'll be doing more analysis.
Dennis mentioned that for Class B applications, viton sheet (not our special recipe) may be adequate. We have used common grade viton in the chambers.
Doug mentioned in an e-mail that questional materials may be wrapped in UHV foil. Ken Mailand reported that he gave two bearing samples, a roller and a
ball bearing to Bob Taylor for Class B cleaning and air baking. Ken will test them this afternoon. He's waiting to hear from Dennis with some fea work.
Before he can finalize the actual lifting capabilities, he needs Oddvar to tell him the final vertical translation allowance for his lift table.
ACTION Dennis and Larry will provide the max. tilt of the optical table due to shifting payloads. DONE - see above. Dennis/Larry ASAP High
8 Glasgow Monolithic Workshop Action Items See Glasgow Workshop, T050010 on Daylinks for complete actions.
See T050010_Action_Tracking on Daylinks under http://www.ligo.caltech.edu/~ctorrie/
SUMMARY NOTES AND ACTIONS FROM THIS MEETING
Agenda items for next meeting, March 1, 2005
1) Review of action items
2) Installation Fixtures
3) Glasgow Monolithic Workshop Action Items
4) Design Meeting summary/comments/issues
5) Suspension modeling - MATLAB & Mathematica
6) Osem/Electronics Updates
7) MC Status