Revision as of 17:53, 22 January 2013

GlueX TOF Meeting
Thursday, January 17, 2013
10:00 am EST
JLab: CEBAF Center, L207

Agenda

1. Announcements
2. Review of last TOF bi-weekly meeting
3. Construction status
   1. ESR material has arrived at FSU
   2. Scintillator purchase
      1. The manufacturer of the TOF scintillator bars is asking if we can get by with about a dozen of the long bars which are shorter by an 1/8"
      2. I suggest we approve request
   3. Light Guide manufacturing: 25% completed, 90% partially milled, 25% milled, 10% pollished
   4. Plan to assemble 1st articles modules next week.
   5. completed MiniTOF support structure built
      1. assembly on sawhorses
      2. mount on rotating support stand
4. Contract status
5. Calibration and Alignment
6. Technical Design Report contribution

References

1. MiniTOF
2. TOF Gluing Fixture
3. PMT testing

Communication

Videoconference

1. ESNet: 8542553
2. EVO: SeeVogh site
   • meeting link
   • Phone bridge ID: 15 1627

Slides

Talks can be deposited in the directory /group/halld/www/halldweb1/html/talks/2013-1Q on the JLab CUE. This directory is accessible from the web at https://halldweb1.jlab.org/talks/2013-1Q/ .

Minutes

Present:

• FSU: Paul Eugenio, Sasha Ostrovidov
• JLab: Eugene Chudakov, Chuck Hutton, Mark Ito (chair), Tim Whitlatch, Beni Zihlmann

Construction Status

ESR material

FSU has received a roll of ESR material, not the standard 3×2 foot sheets, but in a roll 8 inches × 1000 feet. Originally the product came with an adhesive, but that is not present on the roll. This will reduce the thickness of material between counters. The ESR thickness is about 2 mils.

Light Guide Manufacturing

Light guide status:

• 90% partially milled
• 25% fully milled
• 10% pollished

It should take about another month for machining of all the light guides. Next week FSU will assemble the mini-TOF using the first-article modules.

Scintillator Purchase

• FSU has received all the scintillator in the first-article batch, six modules.
• They are in communication with Eljen about the remaining scintillators. Eljen is asking if we can get by with about a dozen of the long bars which are short by 1/8 inch.
• We discussed whether the design of the support structure can accommodate shorter bars and we felt that it could. If there are surprises we could manufacture special lightguides, 1/16 inch longer to compensate.
• We decided to accept the short modules from Eljen.

Mini-TOF Construction

minitof, constrcut 1st article by next week, by next meeting have photos of things inside minitof support structure is done

    assembly on sawhorses
   mount on rotating support stand 

pmt yesterday received the final shipment all have arrived major disaster, computer died, yesterday revived. 1. led to measure gains 2. americium, 100 pmt's done 3. cesium iodide source, spectrum analyzer, 60 pmt's done 4. noise measurements, none done recieved CAEN module scintillator strontium source lead collimator, mounted Sr source, taken away

assessing the bar, move source to a few locations, next week bar ready to attach light guides

contgracdt readynes review end of feb for readiness review

invoiceing form review meeting 1 hour with procurements folks standard invoiocing procedure way to map into evms, track costs as reflected in evmns vs invoices.

calibration and alignment

, g note still in the works

tdr

still out there

<end of note>

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