1 / 19

Energy Deposition of 4MW Beam Power in a Mercury Jet Target

X. Ding, D. B. Cline UCLA H. Kirk, J. S. Berg BNL The International Design Study for the Neutrino Factory FNAL April 8-10, 2010. Energy Deposition of 4MW Beam Power in a Mercury Jet Target. Outline. Introduction Target Geometry Energy Deposition from MARS15

lola
Download Presentation

Energy Deposition of 4MW Beam Power in a Mercury Jet Target

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. X. Ding, D. B. Cline UCLA H. Kirk, J. S. Berg BNL The International Design Study for the Neutrino Factory FNAL April 8-10, 2010 Energy Deposition of 4MW Beam Power in a Mercury Jet Target

  2. Outline • Introduction • Target Geometry • Energy Deposition from MARS15 • Comparison with FLUKA • Power Distribution, radiation dose and life time for SC1 coil • Summary

  3. Introduction • Using MARS15 to study energy deposition. • Study II geometry and magnetic field map. • Hg jet: r=0.5cm, tilt 100mrad to sol. axis. • Proton beam: Simple Gaussian distribution, r=0.15cm, tilt 67mrad to sol. axis.

  4. Introduction (Cont’d) • The unit of energy deposition is GeV or GeV/g p.p (GeV per gram per incident proton). • The number of particles for (4MW, 10GeV) proton beam is 2.5*1015 s-1 (an average beam intensity in particles per second). (2.5*1015)*(10*109)*(1.6*10-19)*10-6 =4MW

  5. Target Geometry

  6. Target Geometry (Cont’d) SC1 SC2 SC3 SC4 SC5 Air FeCo WC Shield Hg Jet Hg Jet STST Env (Bottle) Pre-Trgt Res Sol Hg Pool BeWindow (z=600cm)

  7. Energy Deposition of 4MW Beam Power

  8. Energy Deposition of 4MW Beam Power (Cont’d)

  9. Distribution of Energy Deposition The energy deposition in SC1 coil is between 10-8 and 10-10 [GeV/g per incident proton].

  10. Comparison with Fluka Power Deposition in NuFact Target, J. Back (Warwick, Dec 8, 2009). (http://www.hep.princeton.edu/~mcdonald/mumu/target/index.html#2nd_OP_workshop)

  11. Comparison with Fluka (Cont’d)

  12. Power Deposition and Radiation Dose in SC1 Coil The max. energy deposition at the SC1 coil is 10-8 GeV/g per incident proton. So the max. power deposition per kg at SC1 coil is 4W/kg. 10-8*(109)*(1.6*10-19)* 2.5*1015 * 103 =4 W/kg The average power per kg is 0.46 W/kg. (22.1 kW, 4.8*104 kg) 1yr=2*107 s and 1Gy=1J/kg. The max. and average radiation dose per year in SC1 coil is 8*107 (Grays/2*107 s) and 9.2*106 (Grays/2*107 s), respectively.

  13. Lifetime of SC1 Coil SC coil in Study II (Table 3.4) : (http://www.cap.bnl.gov/mumu/studyii/final_draft/chapter-3/chapter-3.pdf) Max allowed Dose (see Al Zeller, Radiation Issues in Capture Solenoid) (http://www.fnal.gov/projects/muon_collider/nu-factory/subsys/ss-target/scan3.pdf) Evaluation of life time for SC1 coil:

  14. Enhanced Shield for SC Coils(WC shield is extended from R=50 to R=63 cm.)

  15. Energy Deposition in SC coils(4MW beam, enhanced shield)

  16. Enhanced Shield for SC Coils(No Res Sol, WC shield is extended from R=50 to R=63 cm.)

  17. Energy Deposition in SC coils(4MW beam, no Res Sol, enhanced shield)

  18. Distribution of Energy Deposition (No Res Sol, WC shield is extended from R=50 to R=63 cm.)

  19. Summary • The bulk of the 4MW beam power is deposited in the tungsten-carbide shield, Hg Jet and STST Env. • Both MARS 15 and FLUKA simulations give us similar results. • Power deposition and radiation dose for SC1 coil are calculated and the life time of SC1 coil is evaluated based on the Study II document. • Enhanced shield can decrease the power deposition in SC1 coil from 22.1kW to 4.8kW. By replacing the Res Sol by WC shield, the power deposition in SC1 coil can be decreased further to 1.3kW.

More Related