fee for phos #3

Hiroshima univ. quark physics lab.Hiroshima univ. quark physics lab.

FEE for PHOS #3

01/10/2008 PHOS MeetingFumihiro Chuman, Takashi IwasakiHiroshima Univ. Quark Physics Lab.

23/04/19 1

Hiroshima univ. quark physics lab.

Introduction 112 FEEs are necessary for PHOS#3. The mass production of the FEE

were done at Wuhan, and 124 FEEs had reached from Wuhan already last Spring. All of them have already passed tests at Wuhan. They need to be modified and tested before installation.

With help by Sasha and Dong, we did the following modification and operation check from 28/07/2008 to 25/08/2008 to make FEEs of PHOS#3 ready for installation.

23/04/19 2


Modification1. Remove resistance 1758 and change resistance R84 to 2.7k2. Remove ST2 Jumper and put ST1 Jumper3. Glue socket for shielding4. Glue TY connector for reinforcing

Detail slides are in back up

23/04/19 3


Operation Check 1. Switch on FEE by apdgui

check whether the FEEs are switched on

2. Reprogram firmware The one for the test -> Bergen 3.5

3. Stress-test the FEEs Write values to ADC and some resisters and

confirm whether same values can be read.

4. Switch off FEE by apdgui check whether the FEEs LED switch off

5. Repeat above 1-4 steps if any problem happen.

23/04/19 4

Set up

DAQ computer


Test results and conclusion Number of FEE:124 Good FEE: 109 Bad FEE : 15

Missing TY connector: 7 But 6 FEE passed operation check

Operation problem: 9 One FEE have both problem

I put those details below https://www.hepl.hiroshima-u.ac.jp/member/record/iwasaki/0823_PHOS3_modification_and_test.xls

The number of good FEEs doesn't reach 112 pieces necessary for the installation. Dong is investigating the bad FEE and plans to prepare enough FEE for PHOS #3 installation.

23/04/19 5


Back up

23/04/19 6


Modification 1

1. Remove a resistance 1758 and replace a resistance R84 to 2.7k Resistance 1758 was used when

the test of the GTL bus without RCU, and now it doesn’t need because it’s contained in RCU.

The value of the resistance R84 was wrong due to a design error.

2. Remove ST2 jumper and put ST1 jumper

23/04/19 7

Change R84 to 2.7K

ST2 jumper


Modification 2

3. Glue 23 sockets for supporting cooling cupper plates.

4. Glue TY connector for reinforcing This connector was fragile

23/04/19 8


Details of operation problems FEE020007: Stress test failed

FEE020030: Couldn’t power onFEE020034: Stress test failed and LED didn’t flashFEE020094: Stress test failedFEE020159: Stress test failedFEE020163: Couldn’t power off but stress test is goodFEE020167: Couldn’t power off but stress test is goodFEE020242: Couldn’t power onFEE020244: Couldn’t power off but stress test is good

23/04/19 9


TY connector TY connector is output from each of 14 FEEs to TRU for sum

of all amplitudes.

23/04/19 10

Reinforced TY connector Missing TY connector

fee for phos #3

Documents