Scheme for Contaminating LAr with Nitrogen

Document #:

LARTPC-doc-97-v3

Document type:

Note

Submitted by:

Terry Tope

Updated by:

Terry Tope

Document Created:

10 Mar 2006, 18:46

Contents Revised:

27 Mar 2006, 15:57

Metadata Revised:

27 Mar 2006, 15:58

Abstract:

A scheme for introducing nitrogen contamination into a test cryostat thru a capillary tube and diffusion stone.

Files in Document:

• Equation that relates sample bottle pressure to PPM and phase concentration effect (ppm_by_weight__n2.pdf, 59.6 kB)
• How liquid surface tension and diffuser surface energy affect gas bubble size. (factors_that_effect_bubble_size.pdf, 27.7 kB)
• Picture of the 0.5 micron sintered metal diffusion stone above a LN2 bath (diffusion_stone_in_before_cryo_insertion.JPG, 3.3 MB)
• Picture of the 0.5 micron sintered metal diffusion stone bubbling nitrogen in alcohol (diffusion_stone_in_alcohol.JPG, 3.2 MB)
• Plot of Nitrogen bubble velocity vs. bubble diameter (nitrogen_bubble_velocity_in_argon.pdf, 63.2 kB)
• Schematic and plots (n2_contamination_schematic.pdf, 155.7 kB)
• the arithmetic in XL (ppmcalculator.xls, 13.5 kB)

Topics:

• Purification (chemical and radio):Purity Measurements
• Cryogenics:Design/Calculations
• Purification (chemical and radio):Materials Tests
• Purification (chemical and radio):Design/Calculations

Authors:

• Terry Tope