Summary Requirement and Specifications.pdf

file:///jake/...cryostat%20system,%20McCaughan/Requirement%20and%20Specifications%20-%20Items%20+%20Ancillary%20Services.txt[2/16/2021 6:21:44 PM]

#### MAIN-ITEM REQUIREMENTS

Item 1: Rapid-cooldown cryostat system Quantity: 1 Specifications:

- 1.1: Minimum temperature below 1.6K

- 1.2: Continuous operation: Sample exchange must not require warmup of entire system

- 1.3: Rapid cooldown time after sample exchange. Maximum 60 minute cooldown time after exchanging sample (for cooldown from 300K→2K). Note that it is acceptable for the initial system cooldown times to be much longer

- 1.4: Sample space 50mm diameter

- 1.5: "Cryogen-free" (must not require external supply of cryogenic liquid helium)

- 1.6: "Pulse-tube" type cold head to reduce vibrations

- 1.7: One sample probe/dipstick included

#### SEPARATELY PRICED OPTIONS AND SERVICES:

Item 2: Optical-access window Quantity: 1 Specifications:

- 2.1: Allows line-of-sight optical access to sample

- 2.2: Set of fuzed quartz windows

- 2.3: Set of aluminum blanks to cover windows when optical access not needed (these should come installed)

Item 3: Temperature controller Quantity: 1 Specifications:

- 3.1: Four channel temperature controller

- 3.2: Heater capable of 50W

- 3.3: Compatible with Lakeshore temperature sensors

Item 4: Vacuum pumping station Quantity: 1 Specifications:

- 4.1: Turbo pump + roughing pump pumping station

Item 5: Additional sample probe/dipstick Quantity: 1 Specifications:

- 5.1: 2x 24-wire connections

- 5.2: Calibrated temperature sensor