1 / 5

1 July 2009 SVD meeting

1 July 2009 SVD meeting. SVD operation . Belle spring operation f inished safely. No serious problems so far. Full depletion voltage > 70 V ( No change since 2003). Water leak in the cooling water circulation system. Pump. Will be fixed by the start of next DAQ (14 October).

rory
Download Presentation

1 July 2009 SVD meeting

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 1 July 2009 SVD meeting

  2. SVD operation • Belle spring operation finished safely. • No serious problems so far. • Full depletion voltage > 70 V ( No change since 2003). • Water leak in the cooling water circulation system. Pump. Will be fixed by the start of next DAQ (14 October). • Belle end cap detectors will be removed for CDC leaky wire operation. SVD can not be accessed.

  3. DSSD • HPK decided to restart DSSD production. • Test production will be done this fiscal year. • Real “testable” sensor will be produced in the next fiscal year. • Meanwhile, test production by SINTEF and Micron will be continued. • RFQ (when?) • Bidding process by Japan agency company will be necessary.

  4. Discussion with Mechanics people • There are several requests. • One is if it is possible to glue “ribs” directly to sensors. • Kapton circuit will be glued on top of the ribs. • Another Windmill structure • Installation of the last ladder with a slant sensor in each layer seems to be difficult, if not impossible. • Ladder mount is done while the support structure is separated. Finally two halfs are put together. • How do we asure the accuracy?  Need more discussions APV25 Cooling tube DSSD sensors Ribs

  5. Super KEKB IP chamber • KEKB people now only discuss on the nano beam option only. • The radius of beam apertures in the final focus Super conducting Q magnets can not be larger than 10 (or 10.5) mm. • The beam pipe radius is automatically same or smaller than 10(.5) mm. • Still synchrotron radiation is better than in the high-current option. • BKG/SR calculation will be done by the IR group lead by M. Iwasaki.

More Related