SPARO Cryostat

Documentation on Cryogenic Operation

• List of Documentation for the South Pole Operation of SPARO
• Photos of fixtures used during cool down
• Photos of installation procedure for SPARO
• Photos of helium transfers
• Miscellaneous photos of SPARO Cryostat
• Documentation and spec sheets on SPARO Cryostat

Helium Usage at the South Pole in 2001

• Identifying information for NSF 3000 Gallon dewar
• Here is a tcl/tk application that calculates the amount of LHe left in the 3000 Transport. Try it!
• Spreadsheets:
  Wessingtons
  3K Gallon Transport
• Here are graphs we made using some of the information from Allan Baker's spreadsheet:
  • Data for the NSF 3000 Gallon Transport
  • Data for the Wessington dewars:
  • Wessington #1(Alvin)
  • Wessington #2(Theodore)

Helium Usage at the South Pole in 2000

• Helium tradeoffs: June 2000
• Level of the 3000 Gallon Dewar(in pounds)
• Level of the 3000 Gallon Dewar(in inches of water)
• Boiloff Rate of 3000 Gallon Dewar(in cubic feet per hour)
• Relevant Dewar Data (withdrawals, pressure readings, heliumlevel, etc.)

Helium Usage at the South Pole in 1999

• Level of the 3000 Gallon Dewar(in Gallons)
• Level of the 3000 Gallon Dewar(in inches of water)
• Flow Rate of 3000 Gallon Dewar
• Paul Sullivan's Data from '97

Miscellanous Documentation on Cryostat

He⁴ Cryostat

• Assembly drawing from Jeff Sundwall. 05/28/97.
• Part and status list for He⁴ cryostat 10/29/96.
• Drawing of LHe⁴ reservoir from Jeff Sundwall. 04/01/96
• Proposed indium seal from Jeff Sundwall. 03/12/96.
• Mating flange for feedthrus with conflat seals. 04/16/96

He³ System

• Pumped Pot
• Pumped Pot Performance
• Pictures of the ³He system assembly. 7/21/97
• Dimensions of various components of the ³He system.

• South Pole transfer tube

Thermal Modeling

• Explanation of Rob Boyle's thermal modeling spreadsheet.
• Some of my thermal models.
• Bibliography.

Construction and Testing Highlights

• Design Requirements
• Design Possibilities
• Indium Seals
• Design Calculations
• Summary of our trip to Carnegie Mellon to check the fit of the dewar on the telescope. 8/10/97
• Photos from the fit check. 8/10/97
• Cool Down Data
  • March 22, 1997
  • Data: December 1997
  • Photos: December 1997