6 Nov
2012
6 Nov
'12
6:47 a.m.
Hi All,
This will be the last report from me. Calibration activities have
started and somebody else will be reporting on these.
Observing:
----------
121104 04:56:28 - 121106 00:40:01
* 9_CMB_36c_dk293_016.sch
* Aborted to mount FFFlat
* bicep33 rebooted and GCP & masd restarted after schedule
121104 04:38:59 - 121104 04:40:23
* mce_autotune.sch
* MASD restart, DSP driver reload & mce_reset_clean, GCP restart
after running schedule.
121104 01:35:57 - 121104 01:44:13
* starpoint_pole_bicep_summer.sch
* Not clear enough for an actual pointing. Just showing Chin Lin
how to run a pointing schedule
121103 22:54:09 - 121103 22:59:46
* do_cycle.sch
* Tilts:
az 0° 180°
x -9.157 -9.377
y 9.371 10.833
* dk=0
* cleaned GS, boot, UFB, window
* Membrane 0.15/0.5
121101 04:33:54 - 121103 22:54:09
* 8_CMBdark_36a_dk068_004.sch
121101 04:20:58 - 121101 04:22:23
* mce_autotune.sch
* MASD restart, DSP driver reload & mce_reset_clean, GCP restart
after running schedule.
121031 23:03:43 - 121031 23:09:19
* do_cycle.sch
* Tilts:
az 0° 180°
x -9.025 -9.256
y 9.602 10.448
121031 23:02:54 - 121031 23:03:41
* do_cycle.sch
* Fridge cycle client died.
121031 22:42:27 - 121031 23:02:54
* 8_NTD_crosstalk_v2_002.sch
121031 22:21:58 - 121031 22:42:27
* 8_NTD_crosstalk_v2_001.sch
121029 05:55:31 - 121031 22:15:25
* 9_CMB_36c_dk248_016.sch
* Aborted in last scan set
Telescope:
----------
- Ran NTD x-talk v2 schedule twice
- Ran CMBdark schedule
- Stopped CMB obs to mount FFFlat
Weather
--------
- Mostly good, clouds and overcast periods prevented pointing schedules
during the fridge cycles
Cryogenics:
-----------
* Tracking spreadsheet at
http://bicep.rc.fas.harvard.edu/bicep2/south_pole_helium_usage/Summer_2011_…
* Flint is here
* I investigated the much higher than usual vent gas recapture rates in
the previous two transfers. Found that Kathleen didn't completely close
the valve on tank 5. Pressure was slowly equalizing between tanks 5 and
8. Measured contamination in 5, 6, 7, and 8 and they appear clean. Flint
will just have to top up tank 5 once we are done with 8.
* Kathleen's Cryo Sitrep:
LHe:
* Approximately 2800 liters of useable LHe remain in the Wessington
dewars.
* Approximately 500 liters of LHe were delivered to BICEP2.
* Based on a historical consumption rate of 35.7 liters/day, LHe
supplies are expected to be exhausted by January 2013
GHe:
* Out of 16 storage tanks for gaseous helium: 7 tanks are at 17.2 MPa
(2500 psi), two tanks are at 13.8 MPa (2000 psi), one tank is at
12.4 MPa(1800 psi), one tank is at 10.3 MPa (1500 psi), one tank is
at 6.2 MPa (900 psi), one tank is at 2.8 MPa (400 psi), one tanks is
at 1.0 MPa (150 psi), and two tanks are at 0 MPa (0 psi).
* Vent GHe from the LHe transfer was compressed into the storage tanks.
LN_2 :
* The liquid nitrogen plant turned on 28 October 2012 and turned off
03 November 2012
* Approximately 550 liters of LN2 are currently stockpiled on station.
Analysis/software/computers:
----------------------------
- Firewall crashed again today. Second time now. Will investigate.
Cheers,
Steffen
