[Solid_daq] SoLID EC/DAQ meeting minutes 3/26

[Xiaochao Zheng]

Dear All:

I have summarized yesterday's meeting at the following link:

http://hallaweb.jlab.org/experiment/PVDIS/SoLID/EC/meetings/SoLID_EC_Weekly_minutes.html#20140326

It contains a table for the latest cost estimate which was compiled this morning.

The todo list is copied below:

1. Yi will look into Crockroft-Walton base and see if it's good enough for our use (Hall D ECAL is using a BNL design for C-W bases, we need to add preamp, noise typical to C-W bases could be a concern);
2. Yi will get the assembled R9800 unit from Hall D for testing at UVa;
3. Alexandre C. will talk to Thia about getting help on PMT base design from V.P.;
4. Alexandre C. will look into low voltage power supply cost in case of C-W bases;
5. Zhiwen will talk to Jin about calculating the radiation dose for PS/SPD for outer radius modules. Better to get the continuous radial dependence. MAPMT can still be used if a significant amount of modules have 100 times less than the most inner module used for the calculation above;
6. We are still waiting (Jin) to see if 30 p.e. from Preshower is too low for PID;
7. Xiaochao will update the pCDR appendix and cost estimate. Will also look into PMT base design at UVa.

Thanks,

Xiaochao

----- Original Message -----
From: "Xiaochao Zheng" <xiaochao at jlab.org>
To: "solid ec" <solid_ec at jlab.org>, "solid daq" <solid_daq at jlab.org>
Sent: Wednesday, March 26, 2014 9:39:57 AM
Subject: [Solid_ec] SoLID EC/DAQ meeting Wednesday 1:00-2:30pm

Dear All:

We will have an EC/DAQ meeting on Wednesday (tomorrow) from 1:00pm to 2:30pm. I have reserved CC F228 for the meeting. The call-in instruction is as usual:

US: 1-866-740-1260 International 303-248-0285 
passcode: 1066548

For today's meeting I am planning to focus on: 
1) Calculation of MAPMT or PMT anode current and gain for SPD, PS and Shower;
2) It will be very helpful if someone can remind everyone and/or review why we can't use SiPM or APD?
3) PMT cost estimate;
4) EC cost estimate (update from IHEP).
5) Other things that people may want to report.

Thanks,

Xiaochao

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