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MICE Collaboration meeting at Columbia University, New York 12 – 14 June 2003 How Liquid Hydrogen behaves thermally in a Convective Absorber by Wing Lau, Stephanie Yang -- Oxford University

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MICE Collaboration meeting at Columbia University, New York 12 – 14 June 2003 How Liquid Hydrogen behaves thermally in a Convective Absorber. by Wing Lau, Stephanie Yang -- Oxford University. Cooling performance of the Convective absorber design - PowerPoint PPT Presentation

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Page 1: MICE Collaboration meeting at Columbia University, New York 12 – 14 June 2003

MICE Collaboration meeting at Columbia University, New York

12 – 14 June 2003

How Liquid Hydrogen behaves thermally in a Convective Absorber

by

Wing Lau, Stephanie Yang -- Oxford University

Page 2: MICE Collaboration meeting at Columbia University, New York 12 – 14 June 2003

Cooling performance of the Convective absorber design

The MICE absorber adopts a convective cooling design.

The heating power of the beam is being cooled by the stagnant pool of liquid hydrogen which contacts directly. The liquid hydrogen is in turn being cooled by the gas helium.

Page 3: MICE Collaboration meeting at Columbia University, New York 12 – 14 June 2003

The analysis are being carried out in two phases. In the first phase, we examine the cooling effect of the absorber without any heat exchange from the gas helium. In this model, the initial temperature of the liquid hydrogen was set at 17K and the containment walls of the absorber is kept at 17 K. Adiabatic boundary conditions were applied, i.e. no heat is exchanged between the outside and the inside of the containment wall. This is a reasonable assumption as there is a layer of vacuum outside the absorber that prevents heat transfer by convection;

This work is now completed. We looked at how the liquid hydrogen behaves under a beam power of 60W, 150W and 300W respectively.

In our second phase of the analysis, we have included the helium gas a medium of heat exchange. The temperature of the containment wall is no longer specified, but determined by flow and heat carrying capacity of the gas helium. This work is still on going.

Page 4: MICE Collaboration meeting at Columbia University, New York 12 – 14 June 2003

A reminder of what we did on the force –flow Absorber design

Page 5: MICE Collaboration meeting at Columbia University, New York 12 – 14 June 2003

without the inlet and outlet manifolds with the inlet and outlet manifolds

The 3-D models

Page 6: MICE Collaboration meeting at Columbia University, New York 12 – 14 June 2003

model mesh -- over 1.5 million grids

Beam modelled as a 10mm tube

Page 7: MICE Collaboration meeting at Columbia University, New York 12 – 14 June 2003

Steady state velocity results

Page 8: MICE Collaboration meeting at Columbia University, New York 12 – 14 June 2003

The CFD model for the Convective absorber design

Page 9: MICE Collaboration meeting at Columbia University, New York 12 – 14 June 2003

The CFD model showing the containment and the beam

Page 10: MICE Collaboration meeting at Columbia University, New York 12 – 14 June 2003

The CFD model showing the close containment

Page 11: MICE Collaboration meeting at Columbia University, New York 12 – 14 June 2003

Results for a beam power of 60 W

Page 12: MICE Collaboration meeting at Columbia University, New York 12 – 14 June 2003

60W beam power

Page 13: MICE Collaboration meeting at Columbia University, New York 12 – 14 June 2003
Page 14: MICE Collaboration meeting at Columbia University, New York 12 – 14 June 2003
Page 15: MICE Collaboration meeting at Columbia University, New York 12 – 14 June 2003
Page 16: MICE Collaboration meeting at Columbia University, New York 12 – 14 June 2003
Page 17: MICE Collaboration meeting at Columbia University, New York 12 – 14 June 2003
Page 18: MICE Collaboration meeting at Columbia University, New York 12 – 14 June 2003
Page 19: MICE Collaboration meeting at Columbia University, New York 12 – 14 June 2003

Results for a beam power of 150 W

Page 20: MICE Collaboration meeting at Columbia University, New York 12 – 14 June 2003

150W beam Power

Page 21: MICE Collaboration meeting at Columbia University, New York 12 – 14 June 2003
Page 22: MICE Collaboration meeting at Columbia University, New York 12 – 14 June 2003
Page 23: MICE Collaboration meeting at Columbia University, New York 12 – 14 June 2003

Results for a beam power of 300 W

Page 24: MICE Collaboration meeting at Columbia University, New York 12 – 14 June 2003

Temperature result at 300W, LH2,

Page 25: MICE Collaboration meeting at Columbia University, New York 12 – 14 June 2003
Page 26: MICE Collaboration meeting at Columbia University, New York 12 – 14 June 2003

Velocity result at 300W, LH2

Page 27: MICE Collaboration meeting at Columbia University, New York 12 – 14 June 2003

The Phase 2 model

Page 28: MICE Collaboration meeting at Columbia University, New York 12 – 14 June 2003

Absorber diameter: 300mm

Beam diameter: 10mm, Power: 150W

GHe pipe diameter: 15mm, length of pipe is 15mm, inlet velocity: 2m/s

Multicomponent: fluid domain: GHe, LH2, fluid sub-domain: beam, solid sub-domain: wall

Turbulent Model: K-Epsilon

Initial temperature: GHe:17K, LH2: 17K

Global Temperature result see next page

beam

GHe inlets

GHe outlets

Meshed model

LH2 region

Solid dividing wall

Page 29: MICE Collaboration meeting at Columbia University, New York 12 – 14 June 2003

naturalConvtn_abs_tst_002.res

Page 30: MICE Collaboration meeting at Columbia University, New York 12 – 14 June 2003

naturalConvtn_abs_tst_004.res

Page 31: MICE Collaboration meeting at Columbia University, New York 12 – 14 June 2003

Simple hand calculation:

Given: Specific heat of LH2: 9680 J/kg K

LH2 density: 70.79kg/m^3

Volume of absorber window: 0.0196672m^3

Density * volume = 70.79*0.0196672 = 1.392241088kg

Cp*1.392241088kg = 13476.8937318 J/K

300W = 300 J/s

300 (J/s) / 13476.8937318 (J/K) = 0.02226K/s

For 300W, 2.5K needs 44 secs

60W, 1K needs 2246 secs


Status of MICE Tracker System H. Sakamoto, Osaka University (on behalf of the MICE Collaboration) International Muon Ionization Cooling Experiment (MICE)

Collaboration Board Summary MICE CM 25 November 7, 2009

Luminosity Monitor Design MICE Collaboration Meeting 31 May 2009 Paul Soler

MICE collaboration meeting Alain Blondel 26-29 June 2005 1 MICE collaboration meeting 12 at Frascati -- Introduction -- MICE: progress and challenges

MICE Collaboration Meeting Oct05

Conflict and Collaboration in Business Organization - Columbia

MICE Collaboration meeting at CERN March 28 – April 1, 2004 MICE Cooling Channel --- AFC Module work group report Wing Lau – Oxford

MICE Status (with a UK slant) Paul Drumm, MICE Collaboration UK-NF June 2003

MICE collaboration meeting 11 at Berkeley -- Wrap-Up --

Collaboration Board Summary Alan Bross MICE CM 26

Software parallel session summary MICE collaboration meeting INFN, Frascati 27/6-05

MICE Tracker Readout and Data Acquisition; Solenoid Magnetic Field Measurement Terry Hart for the MICE Collaboration, Illinois Institute of Technology,

Grid Update Henry Nebrensky Brunel University MICE Collaboration Meeting CM23

The status of the construction of MICE Step IV K. Long, on behalf of the MICE collaboration

MICE Wrap-up Michael S. Zisman Center for Beam Physics Lawrence Berkeley National Laboratory MICE Collaboration Meeting—Osaka March 3, 2006

1 EMCal design MICE collaboration meeting Fermilab 2006-06-08 Rikard Sandström

MICE RF and Coupling Coil Module Integration Issues Steve Virostek Lawrence Berkeley National Laboratory MICE Collaboration Meeting October 27, 2004

MICE Wrap-up Michael S. Zisman Center for Beam Physics Accelerator & Fusion Research Division Lawrence Berkeley National Laboratory MICE Collaboration

1 MICE Hall Layout MICE Collaboration Meeting, LBNL, February 12, 2005 Paul Drumm for Yury & the RAL team

MICE CM33 Welcome MICE 33 rd Collaboration Meeting, Glasgow, 25-29 June 2012 Paul Soler

MICE Oversight Committee Meeting RAL, 24 April 2014 Paul Soler on behalf of the MICE Collaboration Status of MICE and Spectrometer Solenoids

Alain Blondel MICE collaboration meeting CM25 RAL November4-7 2009 MICE The International Muon Ionization Cooling Experiment

MICE Collaboration Meeting 8th Octorber 2006 1 KEK Beam Test Analysis Hideyuki Sakamoto 16 th MICE Collaboration Meeting 8 th October 2006

MICE Collaboration meeting at CERN March 28 – April 1, 2004

MICE Coupling Coil Testing at Fermilab MICE Collaboration Meeting Ruben Carcagno March 15, 2012 1R. Carcagno - MICE CC Testing at Fermilab3/15/2012

Report from the MICE collaboration board

KEK Beam Test Koji YOSHIMURA KEK MICE Collaboration Meeting 2004.10.28 Koji YOSHIMURA KEK MICE Collaboration Meeting 2004.10.28

MICE RF System Power Supplies, Control and Monitoring Status report February 2012 Chris White, STFC Daresbury Laboratory MICE Collaboration Meeting CM32,

MICE Hydrogen Control System MICE Collaboration Meeting CM33 27 th July 2012 PJ Warburton – STFC Daresbury Lab

MICE CM in New York Alain Blondel, June 14 2003 1 MICE COLLABORATION Columbia University June 2003 Action List (online) 1.Funding and some organization

MICE Collaboration Meeting 15 Fermilab MICE Integration By Oxford University

MICE CM39 Alain Blondel CB report 1 Report from the MICE collaboration board

MICE RAL Collaboration Meeting

MICE collaboration meeting at CERN

RF background simulations MICE collaboration meeting Fermilab 2006-06-09 Rikard Sandström