Energy Deposition of 4MW Beam Power in a Mercury Jet Target Xiaoping Ding UCLA Target Studies Mar. 9, 2010 (Update of talk on Feb. 9, 2010)

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Presentation transcript:

Energy Deposition of 4MW Beam Power in a Mercury Jet Target Xiaoping Ding UCLA Target Studies Mar. 9, 2010 (Update of talk on Feb. 9, 2010)

Introduction (I) 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.

Introduction (II) The unit of direct energy deposition is GeV/g p.p (GeV per gram per incident primary particle) or GeV. The number of particles in a given pulse of beam (4MW, 10GeV) is 2.5*10 15 [s -1 ] (an average beam intensity in particles per second). (2.5*10 15 )*(10*10 9 )*[1.6* ]=4*10 6 [W]

Target Geometry

Target Geometry (Zoom) Res Sol Hg Jet SC Sol #1 FeCo #1,#2,#3 Pre-Trgt Ceramic Air Gap BeWindow (z=600) Hg Pool WC Shield STST Env (Bottle) Hg Jet

Map of Region Numbers and Material Indices in the Standard Geometry Sector Z range (-200cm,-165cm) Z range (-165cm,600cm) Z range (600cm,5000cm) R range (50cm,130cm) No. 4 Region IM=(1) air No. 5 Region IM=(-1) No. 6 Region IM=(1) air R range (0cm,50cm) No. 1 Region IM=(-1) No. 2 Region IM=(15) tungsten-carbide & Water shielding No. 3 Region IM=(-1) (IM=-1 are for the regions redefined in non-standard geometry)

Regional Energy Deposition of 4MW Beam Power Regional Name ED [GeV]P [kW]P/P beam [%] No No. 2 (WC shield) No * No *10 -8 ~ 0 No. 5 (air)1.46* No. 6 (air)1.49* In WC shield, the energy deposited by EMS (electro-magnetic shower) is 1.825GeV and GeV through DEX ( ionization losses from all charged hadrons and muons).

Regional Energy Deposition of 4MW Beam Power Regional Name ED [GeV]P [kW]P/P beam [%] Air Gap8.731* ~ 0 Pre Trgt4.041* ~ 0 Hg Pool4.881* Hg Jet Be Window6.217* STST Env Res Sol2.615* Ceramic6.801* FeCo #1,#2,#32.249*

Regional Energy Deposition of 4MW Beam Power Regional Name ED [GeV]P [kW]P/P beam [%] SCSol #15.520* SCSol #25.988* SCSol #33.304* SCSol #41.186* SCSol #52.871* SCSol #61.980* SCSol #78.702* SCSol #83.708* SCSol #92.181* SCSol # * SCSol # * SCSol # * SCSol # *

Visual Display of Energy Deposition The max. energy deposition at the SC coil is [GeV/g per 1ppp]. So the energy deposition at SC coil is10 -8 *(10 9 )*(1.6* )* 2.5*10 15 [W/g] or [W/g].

Enhanced Shield for SC Coils (No. 1,2 and 3 region are extended from R=50 to R=60 cm. WC shield is introduced in No. 3 region. )

Regional Energy Deposition (4MW beam, enhanced shield) Regional Name ED [GeV]P [kW]P/P beam [%] No No. 2 (WC shield) No * No *10 -9 ~ 0 No. 5 (air)6.04*10 -6 ~ 0 No. 6 (air)9.23*10 -8 ~ 0

Regional Energy Deposition (4MW beam, enhanced shield) Regional Name ED [GeV]P [kW]P/P beam [%] Air Gap1.184* ~ 0 Pre Trgt1.373* ~ 0 Hg Pool5.1* Hg Jet Be Window6.287* STST Env Res Sol2.602* Ceramic6.507* FeCo #1,#2,#32.068*

Regional Energy Deposition (4MW beam, enhanced shield) Regional Name ED [GeV]P [kW]P/P beam [%] SCSol #12.379* SCSol #22.025* SCSol #31.339* SCSol #44.212* SCSol #51.028* SCSol #64.208* ~ 0 SCSol #77.835* SCSol #86.482* SCSol #93.758* SCSol # * SCSol # * SCSol # * SCSol # *