Latest revision as of 16:05, 11 March 2012

1 Goal
2 Previous study
3 current run plan
4 test 1 (before water calibration)
5 water calibration
6 test 2 after water calibration
7 test 3 after water calibration
8 test 4 after water calibration
9 test 5 after water calibration and adjust PC pickup coil
10 test 6 compare NMR field sweep and Frequency sweep
11 test 7, frequency sweep for spin up
12 test 8, wait two days to reach max pol
13 test 9, after check optics, seal oven etc
14 test 10 =
15 result
16 result outdated

Goal

To optimize temperature for 3He polarization.

Previous study

summer 2010, using cell Boris, done by John Donaghy et al, note available in paper

current run plan

using cell Boris.

use three 30na coherent laser

holding field 25Gs, phi 180

chose 8 pumping cell temp points from 180 to 250C

Then step by step, we do:

1. adjust oven to desired temperature and wait for it to be stable, then turn on laser

(laser will heat up, find the ovan temperature relation with desired pumping cell temp)

2. measure NMR every 2 hours for 12 times (1 day), 3He should reach max pol now.

3. measure EPR once.

4. measure AFP loss. turn off laser, measure NMR every 2 minutes for 5 times.

5. measure depolarization. keep laser off, measure NMR every 1 hour for 10 times.

test 1 (before water calibration)

1. temperature: oven 210, pumping cell 217, target cell 79.9 (217 1st round, 217 2nd round, 217 3rd round, 217 4th round,217 5th round)
2. temperature: oven 230, pumping cell 233, target cell 86.7 (233 1st round,233 2nd round,233 3rd round)
3. temperature: oven 240, pumping cell 233, target cell 86.7 (NMR_He_20110129_010725 20x120m, spin up, oven temp stable at 233, can't go higher due to air leak at ovan bottom)
4. temperature: oven 220, pumping cell 223, target cell 83.7 (223 1st round,223 2nd round)
5. temperature: oven 225, pumping cell 228, target cell 84.8 (228 1st round,228 2nd round)
6. temperature: oven 215, pumping cell 218.6, target cell 82.5 (218 1st round)
7. temperature: oven 190, pumping cell 195, target cell 74.1 (195 1st round,195 2nd round)
8. temperature: oven 190, pumping cell 196.2, target cell 75.2 (196 1st round)
9. temperature: oven 170, pumping cell 176.8, target cell 67.5 (176 1st round)

water calibration

test 2 after water calibration

test 3 after water calibration

increase temp right after EPR without destroying pol

1. 170 oven, 186.5 PC, 27.7-27.8 38.1-39.3 30.6-30.8 TC

  spin up 11x120m NMR_He_20111119_162441 
  onetime         NMR_He_20111125_182119 (after 5 days with laser on)
  EPR             EPR_AFP_20111125_1835

2. 190 oven, 204.3 PC, 28.4-28.6 40.5-41.2 31.4-31.6 TC

  spin up 10x120m NMR_He_20111125_184220
  onetime         NMR_He_20111126_214648
  EPR             EPR_AFP_20111126_2215

3. 210 oven, 222.4 PC, 29.6 44.9-45.2 32.6-32.7 TC

  spin up 8x180m  NMR_He_20111126_222112
  onetime         NMR_He_20111127_204311
  EPR             EPR_AFP_20111127_2058

4. oven 215, PC 226.8, 30.0 45.6 32.7 TC

  spin up 10x120m NMR_He_20111127_210342
  onetime         NMR_He_20111128_200905
  EPR             EPR_AFP_20111128_2030

5. oven 220, 231.3 PC, 30.2 45.1 34.4 TC

  spin up         setting is wrong, no data
  onetime         NMR_He_20111129_135749
  onetime         NMR_He_20111129_172355
  EPR             EPR_AFP_20111129_1749

5. oven 225

  spin up         NMR_He_20111129_175728

test 4 after water calibration

1. oven 220, PC 231.9, TC 29.9 45.2 33.6

  spin up 11*120m    NMR_He_20111130_200754     
  EPR                EPR_AFP_20111201_1622

  NMR 5*0.4m         NMR_He_20111201_163939    laser on
  NMR 5*2m           NMR_He_20111201_164607    laser on
  NMR 5*0.4m         NMR_He_20111201_165843    laser off
  NMR 5*2m           NMR_He_20111201_170204    laser off

2. oven 225, PC 236.1, TC 30.1 45.7 34.3

  EPR                EPR_AFP_20111202_1606  
  NMR 5*0.4m         NMR_He_20111202_161802    laser on
  NMR 5*2m           NMR_He_20111202_162047    laser on
  NMR 5*0.4m         NMR_He_20111202_163137    laser off
  NMR 5*2m           NMR_He_20111202_163820    laser off

  New Test:
  oven 225, PC 236.0, TC 30.0~30.1,45.9~46.8,33.8~34.3
  spin up 12*120m    NMR_He_20111202_173326
  EPR                EPR_AFP_20111203_1620

  laser off
  NMR_field 5*0.4m   NMR_He_20111203_163043    
  NMR_field 5*1m     NMR_He_20111203_163352    
  NMR_field 5*2m     NMR_He_20111203_163826    
  NMR_freq  5*0.4m   NMR_Freq_He_20111203_164910  
  NMR_freq  5*1m     NMR_Freq_He_20111203_165115
  NMR_freq  5*2m     NMR_Freq_He_20111203_165548

  laser on 
  NMR_field 5*0.4m   NMR_He_20111203_170646
  NMR_field 5*1m     NMR_He_20111203_170929
  NMR_field 5*2m     NMR_He_20111203_171420
  NMR_field 5*0.4m   NMR_He_20111203_172304   
  NMR_freq  5*0.4m   NMR_Freq_He_20111203_172848
  NMR_freq  5*1m     NMR_Freq_He_20111203_173047

3. oven 230, PC 240.4, TC 30.8-30.99 46.8-47.0 34.2-34.4

  spin up 11x120m    NMR_He_20111203_173536 (polarization was not destroyed before spin up)
  EPR                EPR_AFP_20111204_1934

  laser on
  NMR_field 5*0.4m   NMR_He_20111204_185005

  laser off and wait for 15m, temp of PC stay at 203
  NMR_field 5x1m     NMR_He_20111204_200414
  NMR_freq  5x1m     NMR_Freq_He_20111204_201331

test 5 after water calibration and adjust PC pickup coil

1. oven 230 T_pumping=239.3C, T_target=32.1C, 47.9C, 35.7C

  spin up 12x120m    NMR_He_20111206_164213
                         (PC amp 48.9699 amp_error 0.246622 tau 17.6184 tau_error 0.166278)
                         (TC amp 38.8611 amp_error 0.122741 tau 16.678 tau_error 0.0980802)
  EPR                EPR_AFP_20111207_1550

  AFP loss    NMR_He_20111207_161123   5x1min, laser on, good data
                  (PC loss 0.01189 loss 0.0104945 loss 0.00876603 loss 0.011773 loss_ave 0.0107309)
                  (TC loss 0.0107156 loss 0.00943059 loss 0.00876428 loss 0.0134604 loss_ave 0.0105927)
              NMR_He_20111207_161851   5x2min, laser on, need to be checked
              NMR_He_20111207_164230   5x40s, laser on
              NMR_He_20111207_164230   5x1min, laser on

              T_pumping=203C,  T_target=31.9C, 48.4C, 34.7C   laser off
              NMR_He_20111207_170036   5x1min, laser off, good data
              NMR_He_20111207_170818   5x2min, laser off

2. oven 235, cant reach 235 even after adjusting air flow

  spin up 11x120m    NMR_He_20111207_173118

3. oven 225, PC 234.8, TC 31.4 47.0 34.6

  spin up 12x120m    NMR_He_20111208_150200  
                     (PC amp 38.8015 amp_error 0.21706 tau 17.7425 tau_error 0.1844)
                     (TC amp 32.1239 amp_error 0.1227 tau 17.5481 tau_error 0.124282)
                                             
  EPR                EPR_AFP_20111209_1635
  AFP loss           NMR_He_20111209_164421  5x1min, laser on
                     NMR_He_20111209_165305  5x1min, laser on
                     NMR_He_20111209_170044  5x1min, laser on
                     NMR_He_20111209_171519  5x1min, laser on   good one
                     (PC loss 0.00253009 loss 0.001489 loss 0.00658421 loss 0.000295381 loss_ave 0.00272467)
                     (TC  loss 0.00246562 loss 0.00191102 loss 0.00229629 loss 0.0044294 loss_ave 0.00277558)

4. oven 220, PC 230.1, TC 30.7 45.9 35.0

  spin up 12x120m    NMR_He_20111209_223141
                         (PC  amp 35.7233 amp_error 0.265447 tau 19.0275 tau_error 0.254762)
                         (TC  amp 29.6341 amp_error 0.137933 tau 19.2899 tau_error 0.159346)
  EPR                EPR_AFP_20111210_2137
  AFP loss 5x1m laser on  NMR_He_20111210_214037
                          NMR_He_20111210_214622  5x1min, laser on
                          NMR_He_20111210_215200  5x1min, laser on   good one  
                              (PC loss 0.00304883 loss 0.00658595 loss -0.00224954 loss 0.00703551 loss_ave 0.00360519)
                              (TC loss 0.00152955 loss 0.00417518 loss 0.00490693 loss 0.00108878 loss_ave 0.00292511)

5. oven 210,PC 220.8 TC 30.0 44.9 33.0

  spin up 11x120m    NMR_He_20111210_215903
                         (PC  amp 28.1674 amp_error 0.0577626 tau 30 tau_error 5.15775)
                         (TC  amp 22.7238 amp_error 0.253823 tau 22.5265 tau_error 2.3058)
  EPR                EPR_AFP_20111211_1841
  AFP loss 5x1m laser on  NMR_He_20111211_184542
                          NMR_He_20111211_185142
                          NMR_He_20111211_185947  good one 
                              (PC  loss 0.00361561 loss 0.00329046 loss 0.00382612 loss 9.61192e-05 loss_ave 0.00270708)
                              (TC  loss -0.000158035 loss 0.00543516 loss 0.00263695 loss 0.00288104 loss_ave 0.00269878)

6. oven 230, PC 239.3, TC 31.8 48.0 35.3

  spin up 11x120m  NMR_He_20111211_191237 
  onetime          NMR_He_20111212_153333
  onetime          NMR_Freq_He_20111212_153603 (RF 3.2V)
  EPR              EPR_AFP_20111212_1613
  onetime          NMR_He_20111212_161958
  onetime          NMR_Freq_He_20111212_163526 (RF 1.5V)
  AFP 5x1m laser on  NMR_He_20111212_164824

7. oven 230

  spin up 11x120m  NMR_He_20111212_181326

note:
- The sweep interval counting starts from beginning of every sweep, so the sweep time is included.
- one field sweep takes about 30s.
- one frequency sweep takes about 10s.
- after laser off, temp reach stables in about 15m

test 6 compare NMR field sweep and Frequency sweep

oven 230

NMR_Freq_He_20111214_164342   RF 1.5V   amp_PC 19.0443 0.106143
NMR_He_20111214_164514        RF 3.2V   amp_PC 30.8823 0.0384327
ratio 1.62

NMR_He_20111215_003810:    13.6374 0.0341254
NMR_Freq_He_20111215_004032:     8.15775   0.468220
ratio1.6717

NMR_He_20111215_111133        21.42 0.04848
NMR_Freq_He_20111215_111253   12.98 0.07145
ratio1.6502

test 7, frequency sweep for spin up

1. oven 230

  spinup          NMR_Freq_He_20111215_235120

2. oven 225, PC 233.9, TC 31.5 47.9 34.9

  spinup 12x120m NMR_Freq_He_20111216_175821 RF1.5V
  onetime        NMR_Freq_He_20111217_190903 RF1.5V
  onetime        NMR_He_20111217_191208      RF3.2V
  EPR            EPR_AFP_20111217_1921       RF1.5V
  AFP loss laserOn 5x1m   NMR_Freq_He_20111217_192629   RF1.5V
                          NMR_Freq_He_20111217_193223   RF1.5V
                          NMR_Freq_He_20111217_193714   RF1.5V  good

3. oven 220, PC 229.4, TC 31.4 47.5 34.9

  spinup 11x120m NMR_Freq_He_20111217_194817 RF1.5V
  onetime        NMR_Freq_He_20111218_173756 RF1.5V
  onetime        NMR_He_20111218_173844      RF3.2V
  EPR            EPR_AFP_20111218_1851 bad, freqency fluctuate a lot, can't lock
  AFP loss laserOn 5x1m   NMR_Freq_He_20111218_181336   RF1.5V
                          NMR_Freq_He_20111218_181814   RF1.5V
                          NMR_Freq_He_20111218_182337   RF1.5V
                          NMR_Freq_He_20111218_183245   RF1.5V  good
                          NMR_Freq_He_20111218_183245   RF1.5V

4. oven 210

  spinup 11x120m NMR_Freq_He_20111218_185511 RF1.5V
  onetime NMR_Freq_He_20111219_173126    RF1.5V
  onetime NMR_He_20111219_173238
  EPR     
  AFP loss laser on 5*1m  NMR_Freq_He_20111219_173658 RF1.5V
                          NMR_Freq_He_20111219_174325

test 8, wait two days to reach max pol

1. oven 220, PC 228.7 TC 30.6 47.1 33.0

  spinup 6x500m NMR_Freq_He_20120110_175457 RF1.5V
  onetime NMR_He_20120112_154548   RF3.2V
  EPR     EPR_AFP_20120112_1638

test 9, after check optics, seal oven etc

1. oven 230, PC 212.4 224.3, TC 34.7 54.3 38.5

  spin up 11x120m NMR_Freq_He_20120214_174943

2. oven 240,PC 225.9,TC 72.0,37.8

  EPR_AFP_20120309_1742
  Polarization 42.07%
  Average Frequency Shift 48.28KHz

2. oven 240,PC 225.9,TC 72.0,37.8

  spin up 12*120m NMR_Freq_He_20120309_181134
  EPR_AFP_20120310_1638

3. oven 240,PC 225.9,TC 72.0,37.8

  spin up 12*120m NMR_Freq_He_20120310_164730
  EPR_AFP_20120311_1557

test 10 =

result

test 3

Nov15,2011Media:Nov15.pdf

PPT ON Aug.31,2011 including the fitted tao for target cell and pumping cell:Media:Aug31.pdf

result outdated

                      pumpint chamber               target chamber       
test              max. pol        tao            max. pol       tao
217 spin up       22.9028        0.1705         3.88819       0.1914
    spin down                    0.1025                       0.09846
233 spin up       26.8936        0.2733         4.52142       0.2554
    spin down                    0.147                        0.147 
223 spin down     27.7217        0.1169         4.83401       0.1081

Difference between revisions of "Temperature optimization"