Hi All,
Observing:
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120923 07:38:24 - still running
* 9_CMB_36d_dk248_015.sch
120923 07:29:12 - 120923 07:30:37
* mce_autotune.sch
* MASD restart, DSP driver reload & mce_reset_clean, GCP restart
after running schedule.
120923 07:25:11 - 120923 07:25:28
* mce_autotune.sch
* Failed
120923 02:00:05 - 120923 02:05:43
* do_cycle.sch
* Tilts:
az 0° 180°
x -8.904 -9.432
y 9.602 10.514
* dk=0 mark OK
* cleaned GS, boot, UFB, LFB, window
* Membrane 0.12/0.40
120920 07:36:26 - 120923 01:39:14
* 9_CMB_36d_dk113_015.sch
120920 07:28:46 - 120920 07:30:11
* mce_autotune.sch
* MASD restart, DSP driver reload & mce_reset_clean, GCP restart
after running schedule.
120920 02:14:44 - 120920 02:20:29
* do_cycle.sch
* Tilts:
az 0° 180°
x -8.904 -9.377
y 9.393 10.778
dk=0 mark OK
cleaned GS, boot, UFB, LFB, window
Membrane 0.12/0.4
120917 07:52:21 - 120920 01:51:02
* 9_CMB_36d_dk068_015.sch
* MCE error @ 120917 15:20:57:
/usr/mce/mce_script//script/mce_update_userword: line 27:
array_integer + 256 * Reply does not match command. : syntax error:
invalid arithmetic operator (error token is ". ")
* MCE error @ 120918 16:04:58:
/home/bicep/gcp/control/../masd/specific/scripts/mce_fast_pipe:
line 74: 50000000 / Reply does not match command. / 60 : syntax error:
invalid arithmetic operator (error token is ". / 60 ")
/home/bicep/gcp/control/../masd/specific/scripts/mce_fast_pipe:
line 77: / 140 : syntax error: operand expected (error token is "/ 140 ")
Telescope:
----------
- A few non-fatal MCE errors
- Load leveler room exhaust fan troubles continue. The fan belt broke on
the cooling air handler. Managed to get it under control before we
started scanning on 9/20. Cynthia saved the day. She was the only one
small enough to be able to reach the belt (marvel of engineering).
Even before this happened, I requested the motor to be changed, as it
was quite noisy. This will happen tomorrow during the fridge cycle.
Right now it is getting too cold in the load leveler room. Waiting for
someone to turn up to look at it.
Weather
--------
- Windy and overcast, followed by some clear days
Cryogenics:
-----------
* Tracking spreadsheet at
http://bicep.rc.fas.harvard.edu/bicep2/south_pole_helium_usage/Summer_2011_…
Boiling off remaining liquid in Simon and pumping it into the half rack.
* Kathleen's Cryo Sitrep:
LHe:
• Approximately 4400 liters of useable LHe remain in the Wessington dewars.
• Approximately 250 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), one tank is at 13.8 MPa (2000 psi), one tank is at 10.3 MPa
(1500 psi), one tanks is at 5.7 MPa (850 psi), one tank is at 3.5 MPa
(500 psi), one tank is at 1.4 MPa (200 psi), two tanks are 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.
LN2:
• The liquid nitrogen plant tuned off all week
• Approximately 300 liters of LN2 are currently stockpiled on station.
Analysis/software/computers:
----------------------------
- Nothing to report
Cheers,
Steffen