Mimir Status

2014/09/22

Mimir is OFF the Perkins telescope and cooling to operating temperatures.

Status as of today:

Detector Temperature
33.5 K, stable
Optics Temperature

80 K, dropping

Dewar Vacuum
<4x10^-11 torr, stable

Reference: Nominal Operating Temperatures and Pressures:

Sensor & Plot Color
Location / Name
Nominal Operating Values
TA (white)
2nd Stage of Helium Refrigerator
13-16 K
T3 (purple)
Detector Side of Cu Block with Sapphire disk
16-27 K
TB (pink)
Detector Array
33.50 +/- 0.01 K
T8 (yellow)
1st Stage of Helium Refrigerator
50-70 K
T1 (green)
Filter Box
65-75 K
T6 (orange)
Camera Block
60-75 K
T5 (red)
Cold Bench
60-75 K
T7 (gray)
Outside surface of Entrance Window
267-310 K
BA gauge
High Vacuum Sensor inside cryostat
2x10^-11 to 1x10^-4 torr (sampled every 6 hours)
TC1
Thermocouple Sensor inside cryostat
< 0.001 torr

Real-time temperature and vacuum readouts and plots may be obtained from Brian Taylor's Mimir status page by clicking this link.

A cartoon map of the locations of the temperature sensors within Mimir can be found at this link.

The vacuum system monitoring consists of TC1, a thermocouple for the main cryostat (it bottoms out at 1x10^3 torr), TC2, a thermocouple for the LN2 precool loop, and BA, the Bayert-Alpert high vacuum gauge (which is turned on only every 12 hours, once Mimir reaches operating temperatures, as it supplies some 20W of heat).

Complete weather readouts for the past 24 hours at the Perkins telescope site on Anderson Mesa may be see by clicking this link.

Perkins Telescope schedule (links to Lowell Web Site)

Next Proposals (for 2015-Q1) due ~ 1 November.

Past Usage History:

December 2012
November 2012
October 2012
September 2012
August 2012
July 2012
June 2012
May 2012
April 2012
March 2012
February 2012
January 2012

December 2011
November 2011
October 2011
September 2011
August 2011
July 2011
June 2011
May 2011
April 2011
March 2011
February 2011
January 2011

December 2010
November 2010
October 2010
September 2010
August 2010
July 2010
June 2010
May 2010
April 2010
March 2010
February 2010
January 2010

December 2009
November 2009
October 2009
September 2009
August 2009
July 2009
June_2009
May_2009

Apr_2009
Mar 2009
Feb 2009
Jan 2009

Dec 2008
Nov 2008
Oct 2008
Sept_2008
August_2008
July_2008
June_2008
May_2008
April_2008
March 2008
February 2008
January 2008

December_2007
November_2007
October_2007
September_2007
August_2007
July_2007
June_2007
May_2007
April_2007
March 2007
February 2007
January 2007

December 2006
November 2006
October 2006
September 2006
August 2006
July 2006
June 2006
May 2006
April 2006
March 2006
February 2006
January 2006

December 2005
November 2005
October 2005
September 2005
August 2005
July 2005
June 2005
May 2005
April 2005
March 2005
February 2005
January 2005

December 2004
November 2004
October 2004
September 2004
August 2004

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