2013/03/21
- - Run Diary
  - Data

2013/03/21

Run Diary

0015	Returned cold traps to respective baths. Begin 1 K pot and He recovery.
0024	Opened Gate and condenser speedivalve. Opened cold trap 1 speedivalve in the back. G1 rose to 4 mbar. That's a little disconcerting. Was there stuff in cold trap 1? There shouldn't have been!
0031	Opened V1, V13A, V12A. Going to circulate through cold trap 1 anyways, first. Begin opening V6 gradually.
	As an afterthought, maybe should have circulated through cold trap 2 first. Then we could have done the cold trap test (not leak check…). This could be done another time, I suppose.
0102	Opened V6 all the way.
1000	Filled LN2 cold trap full.
1015	Fed cricket 4 pellets.
1045	Begin LHe transfer (16.0%).
1125	End LHe transfer (88.9%).
1226	Plugged in boards (DCRC32/Dib1, DCRC33/Dib2) and powered them. Going to try and lower threshold now to take data.
	Try: 25 ADC bins is too low for DCRC32, 32 ADC bins for DCRC33. Will do an OR trigger, then try and AND trigger.
1247	The temperature keeps oscillating a bit. This instability is … annoying? Worrisome, for sure.
1310	Flash for 5 min, cool for 45 min. Take data at +/-4 V for Dib 1/2. 25 ADC bins for DCRC32, 32 ADC bins for DCRC33 (OR trigger).
1602	Take data at +/-4 V for Dib 1/2. 25 ADC bins for DCRC32, 32 ADC bins for DCRC33 (AND trigger).
1710	Pressures are rising and temperature is slowly dropping. G1 ~ 73 mbar, G2 ~ 74 mbar, P1 = 0.09 mbar. Switch to cold trap 2 to see if we can prevent a block.
	G1 drops to 72.7 mbar, G2 drops to 66.6 mbar, and P1 = 0.085 mbar. Open V11A and 8 to let mixture in cold trap 1 go back into circulation.
1725	P1 increased to ~ 20 mbar in above step. G1 rose to 88 mbar. G2 rose to 82 mbar.
1736	Take data at +/-4 V for Dib 1/2. 25 ADC bins for DCRC32, 32 ADC bins for DCRC33 (Qi2 trigger only).
1757	Fed Cricket 4 pellets.
1823	P2 = 0.65 mbar. It's taken quite awhile to get here and it's pretty high in comparison to the last time we did this cold trap procedure (P1 ~ 0.14 mbar).
	Close V11A → P1 drops to 0.095 mbar.
1910	G1 and G2 have dropped down to 77, 78 mbar. Unexpected, but not unwelcome. Maybe the system is finally settling down.

Data

Three tests were done today with different trigger settings.

Board Configuration: DCRC32 in Dib1 and DCRC33 in Dib 2.
Bias: +/- 4 V for Dib 1/2.
Trigger Level: 25 ADC with DCRC32, 32 ADC with DCRC33.
Run Time: 30 minutes

Test 1 : OR Trigger between Qi on Side 1 and Side 2

Fig. 1: Qsum1 vs. Qsum2 - no cuts.	Fig. 2: Charge spectrum, with threshold, qpart, and chi2 cuts.

Fig. 3: Qpart - no cuts.

Test 2 : AND Trigger between Qi on Side 1 and Side 2

Fig. 4: Qsum1 vs. Qsum2 - no cuts.	Fig. 5: Charge spectrum, with threshold, qpart, and chi2 cuts.

Fig. 6: Qpart - no cuts.

Test 3 :Trigger on Qi Side 2 only

Fig. 7: Qsum1 vs. Qsum2 - no cuts.	Fig. 8: Charge spectrum, with threshold, qpart, and chi2 cut.

I thought it might be best to zoom in on the low end of side 2's energy spectrum for this data set
Fig. 9: Qpart - no cuts.

Table of Contents

2013/03/21

Run Diary

Data