U N C L A S S I F I E D

U N C L A S S I F I E D

Progress Report on the Dual-Use Cryostat

John C. Ramsey Los Alamos National Laboratory

U N C L A S S I F I E D2

Dual-Use Cryostat Introduction

• Dress rehearsal for the nEDM upper cryostat

• Test-bed for various features

• Provides a home for R&D work for the He3 Injection system and the High Voltage system

U N C L A S S I F I E D3

Vacuum Chamber Assembly Status

• Vacuum chamber test assembly in progress

• Pump-down and leak check this week or early next week

U N C L A S S I F I E D4

Radiation Shield Assembly

• Split at two locations to facilitate assembly and modification inside the cryostat

• Top flanges also split

• 45° adapters can be installed after vacuum can

• All components have arrived

U N C L A S S I F I E D5

High Voltage System Modifications

• High voltage insert design nearing completion

• System currently open and undergoing disassembly

• Completed design for 4K shield addition, off to shops early next week

• New cradle allows HV system to be easily moved and lifted into position under cryostat

• Adding cooling lines for shields and central volume

• Connections to the upper cryostat to be made from the bottom without disturbing the upper cryostat

U N C L A S S I F I E D6

Cryostat Support Stand

• Simple support stand will arrive at LANL in a few weeks

• Makes use of small crane to overcome hook height problems in the building

• Auxiliary stands for the crane and atomic beam source forthcoming

U N C L A S S I F I E D7

Coming Soon!

Completion of test assembly / pump-down / leak check

Modification of DR impedance

Assembly of cryostat on support platform

Commissioning and debugging runs

A little finger-crossing, some late nights, and some R&D!