Huan's Logbook

Updates so far

2010-11-02T20:26:00.001-04:00

Add one more option in Get_Acceptance_Correction.C, check doc/html/index.html
Update database to make sure 0 MeV energy threshold for cluster to be considered. ( ps.dat sh.dat prl1.dat prl2.dat )
write a ppt for scintillator problem

2010-10-27T16:50:00.002-04:00

Find scintillator problem because of overflow of left TDC of S2.
Try to know if they are good or bad events.

DB updated

2010-10-22T12:09:00.000-04:00

The optics replay took so long time that it delays DB update for one day. Now here it is.
I also update the doc part for CSR package. SVN out. ^_^

Optics Update

2010-10-21T14:42:00.000-04:00

Finish optics for right arm. Now replaying for final check.
Find problem with scintillator. Will post on elog to discuss with other guys.

Update for today

2010-10-20T20:54:00.005-04:00

Need to figure out what causes beta=0 for right arm scintillator
Fix Sim_Cor bug in Acceptance.C (Thank xinhu)
Generate doxygen code for CSR_Run.h, Calibrate_Scin.C, Acceptance.C, CSR.h
Change Dx Dy of 1646 MeV for left arm in def_optics.h and def.h of halog
Finish organizing the 1102 optics for right arm
SVN not committed yet. Once optics for right arm is done, I will do that.

Left Arm optics update

2010-10-19T21:07:00.000-04:00

Replay 646 MeV optics to get correct original root file from which I will extract info.
Get optics for all energy setting including 399 MeV
Extrapolate 200 MeV optics from existing
Update Dx Dy in def_optics.h and generate_autodb.pl, add L.vdc.config=200 option for momentum setting
Generate new db_run.dat, move to $DB_DIR
Replay new root and generate 01_Optimized.ps in result dir
Fix blog tutorial of cakephp, just use 1.2 tutorial not 1.3
add deline in c.snippet for vim, temporally fix minibufexplorer .file bug

Spin Reversal Note Updated

2006-07-14T16:46:00.000-04:00

Correct the spin-up time mistake (8hours to 13hours). And get the experimental value which is pretty consistent with the expected value.

Check the Spin_Reversal_technote.pdf file

Surface_Shape compared to Perfect Surface

2006-07-13T19:08:00.000-04:00

Check the Z_Shpe.pdf and Sim_Ronchi.pdf file

Parabolic MIrror Fit

2006-07-13T12:50:00.000-04:00

Whit asked Machine shop to map the whole mirror and get 4 groups of data--x1, y1, x2, y2.
x1,y1
One Set of data, 90 deg difference
x2,y1
Rotate Mirror 45 deg, another set of data, 90 deg difference

1Q.pdf
Fit x1 through y2 by using function x^2/Q=z or y^2/Q=z, assuming y or x is zero.

2Q.pdf
Fit x1,y1 and x2,y2 by using function x^2/Q1+y^2/Q2=z

I find Q=1690mm=66in

Check the PDF file

Mirror Test Preliminary Result

2006-05-18T14:09:00.000-04:00

I test two mirrors, one is what we are trying to test, the other one is what I set as reference.

I have uploaded three jpep files(result) into the e-file section on my website. Please check it. Mirror Section

Mirror_Test.jpg
I use one microscope slide to attach two gratings for source and detector respectively. That's because we want to make sure these two gratings are parallel, not cause any deflection on the result in ideal situation.

Mirror_Ref.jpg
use the same device I mentioned above.

Improved_Mirror_Ref.jpg
use two slides with two gratings, put together like sandwich to make sure further.

Parabolic Mirror Test

2006-05-09T16:42:00.000-04:00

I played Ronchi Test for almost one week. First, I didn't get any pattern as I saw on website. Try a lot of different distance, still no sign.
Later, I read manual again, found a serious problem---no grating for source. All right, I added and found a clear view. Unfortunately, it looked so nice if I use my eyeball to see the mirror, it's terrible once after I use Ronchi Test and put image in the monitor.
I paged brad, he suggested I should use one single grating for source and monitor since bow lines may be caused by bending or misaligning two grating for source and monitor respectively.
I tried, however, still got same thing. I'm pretty sure it's not because of monitor lens since this time I use my eyes to see it.

Anyway, I will use webcam for this test tomorrow, so I can save the image on the computer and print.

BigBite Field Mapping and Mirror Test

2006-05-03T20:56:00.000-04:00

May 2,
Brad and I measured the field at both side of detector package of bigbite. It took about 2 hours to finish. The result is stapled onto my logbook(real notebook).

Later, I read the procedure of testing parabolic mirror for Gas Cerenkov. Finally, I decided to use Ronchi Tester to test it since it's the simplest one for rookie.

Here is the 2 websites I read
Ronchi Test1
Ronchi Test2

May 3,
I measure all the parameters for mirror except focal length and surface tolerance. I will continue on it tomorrow morning.

Field_Mapping Labview Program

2006-04-26T21:20:00.000-04:00

I finish testing for Lakeshore 450 Gaussmeter and ZETA6104 Stepper Motor. Basically, I fully understand how to make these two device I/O working.
Today I continue on writing the last part of Field_Mapping Labview code based on Stepper Motor Test program. I think it will work very well as far as USBTOCOM converter arrives. But of course, it may have few bugs in my program, I will fix them once after I get chance to test it after setting up USBTOCOM card.

However i'm just worried if this method can be approved by JP or not since some parts of stepper motor is made of magnetic materials, such as Fe. It may work if I cover it by a frame which can block magnetic field around motor. I don't know yet , but i will tell my friend to try.

Summary of 4/17-4/22

2006-04-24T14:58:00.000-04:00

Understanding the CAMAC and its associated stuff.
Finish writing labview code for ZETA6104 Stepper Motor and LakeShore 450 Gaussmeter. Next step is to combine these two to map the fringe field of Bigbite at the target position automatically. If using old procedure, it may cost one day to finish, right now I guess it only takes 2 hours.

I also update all the manuals for these devices, PID tuning procedure,and RS232 Connection Figure, please check my webpage e-file tab.

Learning C++

2006-04-17T20:02:00.000-04:00

Not much to say. These days I am concerntrating on learning C++. The purpose is to support all software parts in our experiment since all codes have been transferred to C++.

New tests for 4 detectors

2006-04-16T11:56:00.000-04:00

I piled up 4 detectors like a crossroad, then restart the CODA to try to get high resolution result after I changed the geometry.

For target lab, the RS485 converter is coming according to the email which Sale Rep sent to me. I hope it will arrive on next Tuesday so I can start designing circuit in target lab.

Webpage and Technote Updated

2006-04-10T13:19:00.000-04:00

I've updated my webpage, including uploading all my files and changing the interface a little bit.

And I also update my spin-reversal technote, check here.

To do list for next 4 days

2006-04-07T23:33:00.000-04:00

Since we will have collabration meeting next monday and tuesday, I will mainly concentrate on preparing ppt for next 2 days. There will have no news for next 4 days.

Summary of 4/6~4/7

2006-04-07T23:27:00.000-04:00

4/6
Still work with Brad on DAQ system. But we got strange pedestal histogram, thought it's from enviorment noise. Try to find the source.
4/7
Work on DAQ by own hand. Reconnect all the devices to practise and truly understand what's going on here. Still have some questions need to be answer. I will ask Brad and read book to finish this work as soon as possible.
I heard some problem of target from my friend. However, I'm afraid I can't help him until DAQ is done. I'll try my best.

Summary of 4/5

2006-04-06T10:10:00.000-04:00

10:00am~5:00pm
Work with Brad about DAQ. Simple one, only test cosmic ray which trigs 4 detectors coincidently.
Use one ADC and TDC to get data. CODA for reading data from these two devices. Analyzer and Root for analysing data.
Circuit Flow:
Signal
-->P/S Model 778 Amplifier(*2), copy signal
--one-->Model 711 Discriminator, create 4 trigger
------one-->Model 754 Logic Unit, 1 coincidence trigger
-------------->ECL-NIM, trigger to ECL signal
-------------->To TS, check trigger availablity.
-------------->ECL-NIM, trigger to NIM signal
-------------->Model 754 Logic Unit, make 4 copies of trigger
--------------one-->Phillips 7160 CH16, reference time signal
---------------------->TDC****************************TDC signal
--------------one-->Counter for monitor
--------------one-->LeCroy 2323A, delay gate to match TDC trigger
**************************************************ADC gate
--------------one-->TDC trigger***********************TDC trigger
------one-->Phillips 7106 CH1~4, time signal
---------->TDC*************************************TDC signal
--one-->40 nanoseconds delay box-->ADC**************ADC signal

Summary of 4/4

2006-04-04T22:54:00.000-04:00

Whole day
Working on Target.
First drive to hampton to buy a hydraulic hose which one end is swivle, one is thread from hampton rubber company.
Install the stainless-steel tube in the system. And add heat protector on it.
Turn on heater 2. Found 1 shortcut in circuit. Use heat shrink to fix it.
6:00pm
Start running airflow temp test.
7:00pm
Go home for dinner. xfzhu monitor all three indicator.
8:00pm
Back to lab. Fix indicator setting problem.
10:00pm
xfzhu back home for dinner. I'm still here for monitoring.
10:45pm
All test finished. See the details.
Then turn off heater and airflow.

Summary of 4/3

2006-04-03T22:59:00.000-04:00

10:00am
Transversity on-site meeting. Here is the minute.

10:30am
Work with xfzhu in target lab.
Order RS232 to RS485 converter.
One input tube needs to be replaced.
Cell and tube are moved away for us to reinstall new stainless tube.

4:00pm
Trying to install wireless network on my laptop. Failed. Need to call CC.

Summary of 3/29

2006-03-30T00:16:00.000-05:00

10:00am
Continue to organize my harddisk. Why are there so many junks in my laptop? Is it my fault? Oh, my goddness. I hate myself. ^_^

3:00pm
Do some PID test for heater controller. Here you can find more info.

9:00pm
Back to office. Add some figures in my spin-flip technote. And clean my webpage pdf files. Too many history problems.

Summary of 3/28

2006-03-28T23:59:00.000-05:00

10:30am
Help xfzhu to do oven airflow test. Result is here.
Trying to understand how heater control-interlock circuit. It seems that omega relay is switch for heater, KRPA relay is one for interlock.

9:00pm
Arrange the files on my laptop and in the office. I will update my homepage e-file tab.

CODA EASY SETUP TECHNOTE

2006-03-26T11:00:00.000-05:00

Mar 25-27. 3 day shifts. From 8:00am to 4:00pm.
Just now I finish writing "Coda Easy Setup" technote.
The address is
http://www.jlab.org/~hyao/pdf_files/DAQ/coda.ps

Summary 03/24/2006

2006-03-25T09:04:00.000-05:00

10:00am
Trying to get comminucation between Laptop and Heater Controller working. Found we only need to crossover the #2 #3 wire in RJ45 line.

3:30pm
Help Brad to fix the 4th CsI detector. Found 3-4 places have leakage. Rewrap them, now it's fine.

5:10pm
Back to Target Lab. Help xfzhu to setup communication downstairs. We found we could not use the wire which we made crossover and normal wire. We think that's because the distance is so long that it has already excessed the limit of RS-232 ( 12 meters ). However, once we add RS232 Mini-tester in the interface, we find for this two different wire, we can use both to commute. For this part, we don't understand very well, especially the part of Mini-tester.

7:10pm
See Target-Logbook entry 481. At high temperature, the wave tube has some problem.

Summary 03/23/2006

2006-03-23T22:45:00.000-05:00

10:00am
Add some plots in technote for spin-flip.

1:30pm
Finish writing technote. Send it to lyzhu and post it in target logbook.

1:54pm
Attend the group meeting.

3:40pm
Too hungry. Go home to have lunch-dinner.

4:30pm
Back to Rm122 in EEL Building. Stack three detectors in a vertical line in a box, which are surrounded by foam protector. The fourth one needs repaired.

5:30pm
Go to Target Lab in EEL Building. Trying to set up connection between Laptop and Heater Controller. Failed. Tomorrow I will call OMEGA.

8:10pm
Back to office. Writing some technote for CODA.

10:30pm
Almost finished.

Summary 03/22/2006

2006-03-22T23:59:00.000-05:00

10:00am
Setup Computer for controlling Heater Controller

11:23am
Meet Brad and Florentin at Room 122 in EEL Building. Test All four CsI detector with light leakage, found #4 had a hole on one side which cause light leakage. We couldn't get signal when no cover on it.

4:00pm
Borrow Drills and Electronical Hardware from techinian for making a bigger hole on the white plate touched with brown air pipe. Bring them to Target Lab. I will make a log entry for remindering anyone else.

7:00pm
Keep writing technote for spin-flip.

11:47pm
Finished. Link is
http://www.jlab.org/~hyao/pdf_files/He3_Target/spin_flip_technote.ps

Summary 03/21/2006

2006-03-21T23:49:00.000-05:00

10:00am
Meet Brad in Rm126 in EEL Building to figure out DAQ. Unfortunately, we need to learn the CODA code for CAMAC. Hard to find info in CODA manual. Need to ask Expert like Eugen.

1:30pm
Attend Hall-A meeting to know what's going on for GEN.

2:10pm
Follow Brad and Eugen to Rm122. Talk about the test system for CsI detector.Make some room for our test in Rm122. Eugen will create an account for us to run test on his machine and send CAMAC code to Brad.

5:00pm
Discussion with Brad and Florentin about next step for CsI detector test. First do the light leakage test to make sure CsI has been wrapped correctly. Next get the correct parameter for CsI.

5:30pm
Start to write technical note of Spin-Flip program.

11:47pm
Finish 80% writting.

This space will be used as my own logbook

2006-03-21T12:47:00.000-05:00