360 900 1400 Horn –current design- 1510 0.58 mH 2000 0.46 mH Weight : ???? 2500 0.48 mH Comparison BNL type v.s. ‘New horn’ BNL type New horn Strip Line Maybe 4 strip lines for one horn. (c.f. K2K 300mm wide 15mm thick aluminum plates.) Heat Load from Radiation Z Al case t=1.5mm R Water t=5mm 30mmf Graphite r=1.8g/cm3 52mmf In the graphite target, 57kJ/3.3E14 protons in total Z In total, 20kJ/3.3E14 protons = 6 kW @ 0.3Hz (Joule’s heat 13kJ/ms) cf. K2K heat load in the target from the current = 1.4 kW (surface area ~x 7) R Dt~19o Inner cond. Al t=3mm 前提 • 0.75MW対応を基本とし、4MWへ拡張可能とする。 • ホーン、ターゲットシステムは、K-arenaにならい上から釣る。 • ホーン、ターゲットの交換は完全リモートとする。 • ターゲット、ホーン、ビームの方向は、Off-Axis beam 2°~3° に対応して変えられなければならない。(ただし変更は、しばし ば行われるものではなく、<1/yr程度。) •ホーン、ターゲットの修理をするならばホットラボが必要である。 Decay Volume coolingの機械室がターゲット・ス テーション建屋内に必要 配管 25A 40本 (ただし0.75MW時に使うのは、この一部) 110m3/h, 2.9m3 for 4MW C K2K Beam Channel G K2K target station Soil Concrete 2nd Horn Rail, 5-ton crane Target & 1st Horn 3.7m 2.15 Decay Pipe Iron Beam 2.15 SK 17m Stripline-2 Transformer1,2 Cave size (W3.7m, H3.8m, L17m) Cave – Radioactive air is closed simplify. Both transformers is set inside beam line. Stripline-1 : 9.3m, (Cross section t15mmx320mm) Stripline-2 :12.0m, (Cross section t15mmx320mm) Y. Yamanoi –KEK February 4, 2003 Stripline-1 Top view Target Station –Top View- 1.65 1.5 1.40 2.30 0.40 Z' 3.00 1.00 2.00 A 放射化物保管室 B A 1.25 0.20 1.50 0.45 FV2 0.50 2.55 3.60 ターゲット・ステーション(地下レベル) B Target Station –Side ViewA B C D E F 断面図 12.00 TS上屋 0.07mSv/h for 1W/m line TP+11.8m(0.244mSv/h) 3.67 0.20 10.00 1.65 1.25 1.50 5.00 1.9 2.59 2.20 1.00 0.70 5.00 1.00 B 2.00 A 空隙(サービスエリア) TP-1.1m 2.00 13.80 TP-1.1m 2.52 3.50 2.20 土盛り 5.50 6.50 GL=FL=TP+10.8m A B TS cooling r2 Q r2 DT log 2 r1 (熱Qがr1の所で発生したと仮定) r1 r1~1m air 17GeV 1 1.3 10 4 W/m 50GeV 20(m) 80 W/m K Q 0.75MW iron Fe Cylindrical model DT 26 log r 2 18 @ r 2 r1 1m 29@r 2 r1 2m For 4MW, DT 135 log r 2 55 @ r 2 r1 0.5m 92@r 2 r1 1m To protect horns, <80o is preferable. Upgrade to 4MW Al冷却 1 LW 2 A 1 3.5[m] 0.26 106 [ W ] 2 240[ W/mK ] 20[m] 0.2[m] 2 240 DT 0.2m アルミ冷却と空調の併用で 3.5m horn 0.26MW なんとかならないか? 10.00 ISAC風? TP+11.8m(0.244mSv/h) 土盛り 5.50 GL=FL=TP+10.8m A B 5.00 0.20 TP-1.1m 1.9 2.59 空隙(サービスエリア) 2.20 10.00 A B 素朴な疑問/問題 完全リモートにするならば、Al板は、不必要? 放射線、空気閉じ込め、熱伝導体 完全リモートにするならば、Heは、不必要? ホーンの捨て場はこれだけで十分か? 3mのバスバーごと捨てると厳しい? コスト度外視メンテナンス・シナリオ 1年に1度のメンテナンス→ホットラボが欲しい。 TRIUMF ISAC Target Station NuMI Target Hall NuMI by J.Hylen Beam line is below floor level Temporary Stackup of removed shielding Steel from module middle Concrete from over horn Horn+Module in transit Stripline Concrete Cover Module Support Beams Horn Shielding Module Horn Beam passageway (chase) is 1.2 m wide x 1.3 high Steel Shielding Air Cooling Passage Concrete Shielding NuMI by J.Hylen Target and Horn Modules NuMI module = 2 AP0 modules + cross-bracing walls Motor drives for transverse and vertical motion of carrier relative to module Target/Baffle Module 25 cm wide, 2 m deep Steel endwalls with positioning, water, electric feedthroughs Horn 1 Module Remote Stripline Clamp Stripline Baffle Carrier Water tank Target Horn 1 Target moves relative to carrier for insertion into horn for L.E. beam NuMI Target Hall NuMI by J.Hylen Lifting Table in Hot Cell NuMI by J.Hylen Push horn or target up into module remotely – 5 degrees of motion Each table has independent vertical and transverse motion Both tables move together along beam direction Hot Handling Work Cell NuMI by J.Hylen Mount/dismount components on modules Horn mechanical connection to module, remote stripline clamp, waterline connection to horn, electrical connection to horn are all done through the module by person on top of hot cell Railing Module Lead-glass window Horn Remote lifting table Concrete walls 3m Lifting Fixture for Module NuMI by J.Hylen Remotely change pick point to match center of gravity Teeth engaged at center of gravity for horn 1 pick Teeth disengaged to enable movement of hook relative to lifting fixture frame Lifting fixture box frame Module hook Pins to engage module hooks Hot Handling Dose NuMI by J.Hylen for hot horn replacement Note 1 sievert = 100 rem
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