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Harold G. Kirk Brookhaven National Laboratory Target System Update IDS-NF Plenary Meeting Arlington, VA October 18, 2011.

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Presentation on theme: "Harold G. Kirk Brookhaven National Laboratory Target System Update IDS-NF Plenary Meeting Arlington, VA October 18, 2011."— Presentation transcript:

1 Harold G. Kirk Brookhaven National Laboratory Target System Update IDS-NF Plenary Meeting Arlington, VA October 18, 2011

2 Harold G. Kirk 2 Target Baseline: Proton Beam Assumptions Proton Beam Energy 8 GeV Rep Rate 50 Hz Bunch Structure 3 bunches, 240  sec total Bunch Width 2  1 ns Beam Radius 1.2 mm (rms) Beam β * ≥ 30 cm Beam Power 4 MW (3.125  10 15 protons/sec)

3 Harold G. Kirk 3 Target System Baseline Target type Free mercury jet Jet diameter 8 mm Jet velocity 20 m/s Jet/Solenoid Axis Angle 96 mrad Proton Beam/Solenoid Axis Angle 96 mrad Proton Beam/Jet Angle 27 mrad Capture Solenoid Field Strength 20 T

4 Harold G. Kirk 4 Coil and Shielding Concept (IDS120h) Superconducting Coils Resistive Coils SC1 Shielding Key Parameters: SC1 IR = 120 cm Stored Energy 3 GJ B = 20 T

5 Harold G. Kirk 5 20 Secondary Particle Production Black=p, Green=n, Red/Blue=π ±, Orange/Turquoise=e ±, Gray=γ.

6 Harold G. Kirk 6 PEAK ENERGY DEPOSITION (mW/g) 18 FROM ITER peak DE ≤ 0.15 mW/gr IDS90f

7 Harold G. Kirk 7 The Target Module Concept – V. Graves Target Module consists of: Beam/Jet Delivery Cartridge Resistive Coil Package Primary Containment Vessel Hg Collection/Beam Dump

8 Harold G. Kirk 8 Dimensions in cm Inserting the Hg System – V. Graves, ORNL

9 Harold G. Kirk 9 BEAM PIPES BP1: Surrounding Target BP2/BP3: Field Taper Section 5 cm gap between vessels and SC coils reserved for cryogenic shields SHIELFONG VOLUMES SH1: Surrounding Target SH2, 3: Surrounding Decay Pipe SH4: Inside SC Coils SC1-7 W 10 cm 6 cm 2 cm 3 cm 10 cm 15 cm 3 cm 10 cm 2 cm 1 cm 3 Shielding Studies: Bob Weggel, N. Souchlas 4 cm 5 cm 2 cm 5 cm SH2 SC7 SH 1 SH4 SH 3 RS:1- 5 SC 1 SC2 SC3 SC4 SC 5 SC 6 BP1 BP 3 BP2 2 cm

10 Harold G. Kirk 10 Energy Deposition (N. Souchlas)

11 Harold G. Kirk 11 SH1 Peak Energy Deposition 5 W/g

12 Harold G. Kirk 12 SH2 Peak Energy Deposition 2 W/g

13 Harold G. Kirk 13 SH4 Peak Energy Deposition 5 mW/g

14 Harold G. Kirk 14 Shielding Cooling Scenario - Bob Weggel Current Baseline: 60% WC beads + 40% H 2 O Evaluate gas cooling—then can consider W instead of WC V(%)v(m/s)Press. Drop (atmos) SF 6 5.8550.4 Air7.91400.4 H 2 12.01900.1 Ar10,41300.4 He12.01900.1 Hg6.94.5 (If Hg is considered)

15 Harold G. Kirk 15 Pion/muon yields for different atomic Z’s and beam energies (J.Back) Study 2 NF geometry and B- map Acceptance probability histogram used at z=6m (based on ICOOL)

16 Harold G. Kirk 16 What about Gallium? Ga (Z=31) is near the Cu (Z=29) peak. Gallium is a metal (chemically like Al) Physical Properties: ρ = 6.1 g/cm 3 (as a liquid) Melting Point = 29.8 0 C Boiling Point = 2403 0 C

17 Harold G. Kirk 17 Optimized Target Geometry –X. Ding Gallium r = 4.2cm Beam angle = 77 mrad Beam/Jet crossing angle = 9 mrad Meson Production: 15% less than Hg

18 Harold G. Kirk 18 Targetry Tasks for 2012 In progress Iterate Coils/Shielding configuration Design Hg Handling System Finalize Coil/Shielding Configuration What needs yet to be done before costing exercise Define Beam Windows (Up and Down Stream) Define Remote Handling System Define Target Hall configuration Begin Costing (July 2012)

19 Harold G. Kirk 19 SUMMARY l Coil configuration baseline is IDS120h l Baseline shielding is 60% WC + 40% H 2 O l Current target activities focus on: n Establishing a Hg system configuration n Establish a thermal management shielding scenario (gas cooling is being considered) l We are exploring Ga as a possible target alternative

20 Harold G. Kirk 20 Backup Slides

21 Harold G. Kirk 21 The Study 2 Target System Neutrino Factory Study 2 Target Concept

22 Harold G. Kirk 22 STUDY II SOLENOID GEOMETRY SC#1 -120<z<57.8 cm R in =63.3 cm R out =127.8 cm SC#2 67.8<z<140.7 cm R in =68.6 cm R out =101.1 cm SC#6-13 632.5 43.4 cm (TOTAL # SC=13)‏ 5 SHIELDING SC# 2-13 SC#1 IRON PLUG RESISTIVE COILS SC #1 IR

23 Harold G. Kirk 23 Peak Energy Deposition 5.5 mW/g ITER Limit: 1m W/cc  0.15 mW/g

24 Harold G. Kirk 24 Capture Systems Comparisons IDS-120 Study 2

25 Harold G. Kirk 25 Key Target Challenges General Target Issues l Thermal management (~3 MW power deposited) l Shielding (SC solenoids required) l Target integrity (thermal shock) l Target regeneration (50 Hz rep-rate) l 20T environment Liquid Hg specific issues l Stable fluid flow (Nnzzle performance) l Hg handling system

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