h 16:00 CEST

Calling instructions:

Title:        AdV-squeez
Description:
Community:    Virgo - LSC
Password:    Adv-squeez
Meeting type: Open Meeting (Round Table)

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Minutes by Sheon Chua

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AGENDA

Announcements

• Squeezing working area  https://workarea.ego-gw.it/ego2/virgo/squeezing/. WIKI pages. Contents: Agenda of the meeting included the slides to be presented, minute of the previous meeting.

• SVN:  a repository for the current version of the TDR will keep track of all the editings. In this way several writers can collaborate. Need one week.

Topics

• Format of the TDR. Latex?

• Periodicity and scheduling of next meetings.
• organization of a f2f meeting at next Virgo Week (15-17 Sept.)
• TDR chapter 3 (SHG): presentation by Martina and discussion (slides, TDRchapter3-OPOpump)
  
• Plan for the discussion of next chapters of TDR
• Any Other Businesses

MINUTES

Attendance

M Leonardi, A Khalaidovski, A. Rocchi, V. Sequino, S. Chua, G. Prodi, M. de Laurentis, L. Naticchioni, G. Gemme, J. Harms, V. Fafone, J-P Zendri, B. Mours, E. Cesarini, E. Calloni

Announcements

• Squeezing working area  https://workarea.ego-gw.it/ego2/virgo/squeezing/. WIKI pages. Contents: Agenda of the meeting included the slides to be presented, minute of the previous meeting.

• SVN:  a repository for the current version of the TDR will keep track of all the editings. In this way several writers can collaborate. Need one week. Repository: https://svn.ego‐gw.it/svn/AdvSqueezing/

Topics

• Format of the TDR. Latex?

Latex template to be added to the Wiki (Rocchi and Zendri)

• Periodicity and time schedule of next meeting ?

Weekly, Tuesdays at 4 pm (no change)

• Organization of a face to face meeting (next Virgo week 15‐17 September)?

Jean-Pierre Zendri to begin organising, perhaps on the VSC meeting day.

Quick question about the sensitivity curve – Sheon Chua reporting problems with accessing LIGO, is working on it.

• Presentation and discussion of chapter 3. (slides Martina)

Comments:

• EOMs in our case, they simply did not work at 532, though specified to do so by Thorlabs So MZ was the only quick choice (Khalaidovski)
• The proposal is to build a squeezer with the same performance as GEO and H1 Squeezers, so it should be based on those squeezers to minimise R & D (Zendri)
• If you have a DR-OPO, would a single-pass SHG be sufficient to pump the OPO? (Khalaidovski)
• Calculations should inform any decision about single-pass or cavity-enhanced SHG (Chua and Khalaidovski).
• Maybe it would be good if the MC cavity is not open at the top? (Khalaidovski)
• Closed MC is better to prevent degrading of finesse
• A cover should be OK (de Laurentis, Chua)
• Clamped optics, outgassing of glues is suspected of degrading finesse too. (Khalaidovski)

• Next chapters to be included in the TDR.

• Next telecon will be:
• An update on the Green Pump chapter (de Laurentis),
• Presentation of the Homodyne detection chapter (Naticchioni), and
• Recap of previous discussion of the OPO (Sequino) in preparation for that chapter.

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