K1.8 KEK - PowerPoint PPT Presentation

シンポジウム「 J-PARC ・ NP 実験施設でのスト レンジネス核物理」 １ 次ビームラ イ ン光学と K1.8 光学 KEK 野海 博之 １ ． 遅い取り 出し ビームラ イ ン SY － NP-Hall のレイ アウト と ビーム光学 ２ ． K1.8 ビームラ イ ンの設計の現状 NP-Hall のレイ アウト （ 第１ 期） K1.8 の光学と 諸元 ３ ． その他のビームラ イ ン（ 時間があれば） K1.1BR/K1.1/HR ビームラ イ ン ４ ． まと め

Primary Beam Line

Slow Extraction Beam Line Facility (Phase I) NP-HALL 56m(L) × 60m(W) A-Line 50-GeV PS Switch Yard Matching Beam Dump T1 target Section (750kW) (30% Loss) 2.9m 80m 2003/09/04

O p t i c a l P a r a m e t e r s o f S E B e a m For 30 GeV from Tomizawa (2002.10.2) Horizontal Vertical (mm ・ ε H 4.4 π ε V 10.4 π (mm mr) mr) α H α V -2.21 1.133 β H β V 26.476 16.629 (m) (m) dp/p (%) 0.31 η (cm/%) 0.518 η ’(mr/%) 0.084 Emittance (50 GeV) ： ε H = 2.7 π , ε V = 6.3 π Full Acceptance ： ε H = 10.3 π , ε V = 24.4 π mm ・ mr

Beam Envelope （ 30 GeV SEB: ε H =4.4 π / ε V =10.4 π mm ・ mr ） Q Q B B Q Q Q Q Q B B B B Q Q Q Q Q Q Q Q Q Q Q Q Q Q B B Q Q Q Q Q Q Q Q Q Q Q Q Q 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 3 4 4 5 5 2 2 3 3 6 6 7 7 8 9 9 A A 1 2 3 4 4 4 4 5 6 6 7 7 8 9 9 A A B C D A A A B A A C A C A B V V A C A C A C A C A A A A C V V A A C A C B A C A C A A A 1 1 1 D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R M M R R R R Q Q Q F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F P P F F F F T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T 1 2 T T T T (V) # of nodes : 4 8cm B e a m D u m M P S M T T 8cm 1 1 1 1 1 1 Q Q Q Q (H) Q Q 1 1 1 1 1 1 1 1 9 9 9 9 5 5 5 5 . . . . . . . . - - - - 7 7 - - 7 7 4 4 - - - - - 1 - - 4 4 - - 1 1 1 1 1 - Matching S. Switch Yard NP-Hall 5 4 7 7 4 7 7 8 8 7 7 0 0 7 7 7 7 0 7 7 7 7 7 6 0 7 7 0 0 6 7 7 8 8 0 0 0 0 0 7 8 7 . . 6 6 . . . . . 6 6 6 6 . . . . . . . . . . . . . . 6 6 . . . . . . . . . . . . . 8 2 6 9 9 3 3 3 3 3 3 0 3 3 3 3 3 7 6 8 8 9 2 2 1 1 0 5 5 8 8 1 6 1 4 5 2 4 4 2 2 1 1 1 1 0 1 1 1 1 5 8 2 9 9 5 4 4 2 2 3 8 8 2 2 2 3 2 5 7 8 2 2 2 2 6 6 6 6 0 6 6 6 6 4 2 2 6 6 8 2 2 0 0 8 4 4 5 5 1 9 1 0m 60m 100m 150m 210m 260m

3 0 - G e V B e a m P r o f i l e ＠T 1 （ T U R T L E ) σ y σ x = 1.4mm = 0.8mm X(cm) Y(cm) θ (mr) φ (mr)

Beam Envelope （ 50 GeV SEB: ε H =2.7 π / ε V =6.3 π mm ・ mr ） Q Q B B Q Q Q Q Q B B B B Q Q Q Q Q Q Q Q Q Q Q Q Q Q B B Q Q Q Q Q Q Q Q Q Q Q Q Q 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 8 1 2 1 1 3 4 4 5 5 2 2 3 3 6 6 7 7 8 9 9 A A 1 2 3 4 4 4 4 5 6 6 7 7 8 9 9 A A B C D C C A A A B A A C A C A B V V A C A C A C A C A A A A C V V A A C A C B A C A C A A A 1 1 1 D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R M M R R R R Q Q Q F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F P P F F F F T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T 1 2 T T T T (V) 8cm B e a m D u m p M P S M T 0 T 1 8cm 7 7 9 9 D D (H) 1 1 1 1 1 1 Q Q Q Q Q Q 1 1 1 1 1 1 1 1 9 9 9 9 5 5 5 5 . . . . . . . . - - - - 7 7 - - 7 7 4 4 - - - - - 1 - - 4 4 - - 1 1 1 1 1 - 5 4 7 7 4 7 7 8 8 7 7 0 0 7 7 7 7 0 7 7 7 7 7 6 0 7 7 0 0 6 7 7 8 8 0 0 0 0 0 5 6 5 . . 6 6 . . . . . 6 6 6 6 . . . . . . . . . . . . . . 6 6 . . . . . . . . . . . . . 8 2 6 9 9 3 3 3 3 3 3 0 3 3 3 3 3 7 6 8 8 9 2 2 1 1 0 5 5 8 8 4 9 4 4 5 2 4 4 2 2 1 1 1 1 0 1 1 1 1 5 8 2 9 9 5 4 4 2 2 3 8 8 2 2 5 1 5 5 7 8 2 2 2 2 6 6 6 6 0 6 6 6 6 4 2 2 6 6 8 2 2 0 0 8 4 4 5 5 5 1 5 0m 260m

5 0 - G e V B e a m P r o f i l e ＠T 1 （ T U R T L E ) σ y σ x = 1.1mm = 0.6mm X(cm) Y(cm) θ (mr) φ (mr)

Beam Envelope(Full Acceptance: ε H =10.3 π / ε V =24.4 π mm ・ mr) Q Q B B Q Q Q Q Q B B B B Q Q Q Q Q Q Q Q Q Q Q Q Q Q B B Q Q Q Q Q Q Q Q Q Q Q Q Q 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 8 1 2 1 1 3 4 4 5 5 2 2 3 3 6 6 7 7 8 9 9 A A 1 2 3 4 4 4 4 5 6 6 7 7 8 9 9 A A B C D C C A A A B A A C A C A B V V A C A C A C A C A A A A C V V A A C A C B A C A C A A A 1 1 1 D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R M M R R R R Q F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F Q F Q F F F P P F F F F T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T 1 2 T T T T (V) 8cm B e a m D u m p M P S M T 0 T 1 8cm 7 7 9 9 D D (H) 1 1 1 1 1 1 Q Q Q Q Q Q 1 1 1 1 1 1 1 1 9 9 9 9 5 5 5 5 . . . . . . . . - - - - - 7 7 - - 7 7 4 4 - - - - - 1 - - 4 4 - - 1 1 1 1 1 1 1 1 5 4 7 7 4 7 7 8 8 7 7 0 0 7 7 7 7 0 7 7 7 7 7 6 0 7 7 0 0 6 7 7 8 8 0 0 0 0 0 0 3 0 . . 6 6 . . . . . 6 6 6 6 . . . . . . . . . . . . . . 6 6 . . . . . . . . . . . . . 8 2 6 9 9 3 3 3 3 3 3 0 3 3 3 3 3 7 6 8 8 9 2 2 1 1 0 5 5 8 8 0 2 0 4 5 2 4 4 2 2 1 1 1 1 0 1 1 1 1 5 8 2 9 9 5 4 4 2 2 3 8 8 2 2 7 4 7 5 7 8 2 2 2 2 6 6 6 6 0 6 6 6 6 4 2 2 6 6 8 2 2 0 0 8 4 4 5 5 2 6 2 0m 260m

S u m m a r y o f S E B ○ SEB Optics 1) 4 nodes - Focus at MP for - Focus at SM (for future extension to the primary B-line) - Focus at T0 (for future extension to the Test BL) - Focus at T1 for Secondary Beam Lines 2) Defocus at the Beam Dump ⇒ Sato’s Talk 3) Acceptable Beam Emittance: ε H = 10.3 π / ε V = 24.4 π mm ・ mr Expected Emittance ε H =4.4 π / ε V =10.4 π for 30-GeV SEB ε H =2.7 π / ε V = 6.3 π for 50-GeV SEB ○ Beam Profile @ T1 σ x = 0.8mm 、 = 1.4mm σ ｙ (30 GeV) σ x = 0.6mm 、 σ ｙ = 1.1mm (50 GeV)

Secondary Beam Line

S u m m a r y o f E x p e c t e d S - N u c l . P h y s . E x p . & R e q u e s t e d S e c o n d a r y B e a m L i n e s LoI # theme Beam Line Recomm. 06 S=-2 & -1 Nucl. Spectroscopy K1.8/K1.1 Day-1 07 YN scattering K1.8 Phase-1 08 High Res. Hyp. Nucl. Spectroscopy HR Phase-1 09 n-rich Hyp. Nucl. Spectroscopy K1.1BR/HR Phase-1 10 K-bar Nucleus Spectroscopy K1.1BR/K1.1 Day-1 21 Weak Decay K1.1/K1.1BR Phase-1 All to be realized in J-PARC DAY-1 & PHASE-I recommended by NPFC(Jun/2003)

K1.1BR HR K1.8 K1.8 K1.1 K1.1 2003/09/04 2003/09/04

K1.8 Beam Line

Optical Design of K1.8 by Kakiguchi, Nage, Outa, Hayakawa, Takahashi, Sato, and Noumi ○ Initial condition - Primary beam size @ T1 φ 6mm - Target Ni t5.4cm ( λ int ~30% ） - Extraction Angle 6 ° (Left: K1.8/K1.1BR, Right: KL/K1.1 ） Layout around T1 ⇒ Takahashi’s Talk ○ Structure - “IF-Type” F.E. ＋ Separation （ D.S. ） ＋ Beam Analyzer

Choice of the Extraction Angle K - Angular Distribution in 0.6~2.0 GeV/c K - (50 GeV) K - (30 GeV) 1 2 1 2 Relative Yield K - 0 . 6 G e V / c 1 0 1 0 K - 0 . 8 G e V / c 8 K - 1 . 0 G e V / c 8 K - 1 . 2 G e V / c 6 6 K - 1 . 4 G e V / c 4 K - 1 . 6 G e V / c 4 K - 1 . 8 G e V / c 2 2 K - 2 . 0 G e V / c 0 0 0 2 4 6 8 1 0 0 2 4 6 8 1 0 (deg.) (deg.) by Sanford-Wang

K1.8 Layout Beam Mom. Analyzer 2 nd Stage Separation SKS 1 st Stage Separation “IF-type” Front-End Part K1.8 ES2 IF ES1 MS2 MS1 IF: Intermediate Focus T1 TGT