ProtoDUNE Single Phase Signal Feedthrough Cross Tube Cable Support - PowerPoint PPT Presentation

ProtoDUNE Single Phase Signal Feedthrough Cross Tube Cable Support and Cable Routing Manhong Zhao 4/19/2017 Brookhaven National Laboratory

ProtoDUNE Signal Feedthru Cold Cables Signal Feedthru Chimney CE Box APA 2

Cross Tube Cable Support 3

Cross Tube Cable (CTC) Support Adjustment Screws for PD Flange Tube Alignment CE Flange Tee Cross Tube Cryostat Insulation Hood Cable Strain Relief 4

Cable Strain Relief ProtoDUNE (1 chimney per APA): 22 CE cable bundles (2 for extra) 2 PD cable bundles (10 PD cables + 2 extra) 1 SHV cable bundle (8 SHV cables) 5

Stress Analysis of CTC Support Inner Tube 20 kgf force applied on the cable clamping plate along horizontal direction 6

CFD Model of Signal Feedthrough Chimney Gas outlet: 0.35 g/s Liquid Surface Boil Off Flux of ProtoDUNE: 21 g/s from Liquid Outer surfaces Model (see Ref) 6 W/m 2 -K @ 293 K Water mass flux from Teflon cable GAr temperature in ullage insulation 87.93 K @ LAr/GAr interface Reference: ProtoDUNE Ullage Space CFD Model, Erik Voirin 7

Water release of Teflon wire insulation H2O mass flux at Teflon surface Assume after 100 days drying H2O_Flux = 0.216*sqrt(2.715e-12*exp(-4988[K]/T)) [kg m^-2 s^-1] Reference: Mass Transport of Water in Teflon Down to Cryogenic Temperatures; a Transient Numerical Analysis, Erik Voirin 8

Diffusion Coefficient of Water in Argon Gas kg kg 3 − kmol kmol 3 2 ⋅ ⋅ ⋅ + 1.86 10 T M1 M2 Diffusion12 T ( )   1   2     MAr − 6 ⋅ ⋅  ⋅    2.6693 10 T  kg    2       ( ) P 1 kmol ⋅  2 σ 1 + σ 2  ⋅   atm 2 µ Ar T  σ Ar  ( )   ⋅ ⋅   Pa s Angstrom The curve can be fitted as H2O_Diff = 0.275 [cm^2 s^-1] * (T/300[K])^1.9*(1 [atm] /Pressure) Reference: Diffusion Coefficients of Water and Oxygen in Argon, Erik Voirin 9

Results: Gas Flow, Temperature and Moisture Diffusion Gas flow in chimney Temperature Moisture Diffusion Moisture diffused into ullage ~ 9x10 -16 g/sec 10

Cable Routing 11

Cable Routing PD cables PD cables CE cables CE cables PD cables CE cables 12

Cable Routing 13

Cable Routing Differential length stored in this cable tray 14

Cable Routing 15

Cable Routing Differential length of PD cables is stored in a cable tray that is installed at the back side of APA. 16

Cable Routing CE PD cables cables 17

Cable Routing Cable tray support 18