K1.8 KEK - - PowerPoint PPT Presentation

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

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

Primary Beam Line

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

O p t i c a l P a r a m e t e r s

• f

S E B e a m

0.31 dp/p (%) 16.629 1.133 10.4π 0.084 η’(mr/%) 0.518 η(cm/%) βV (m) 26.476 βH (m) αV

• 2.21

αH εV (mm・ mr) 4.4π εH (mm mr) Vertical Horizontal For 30 GeV from Tomizawa (2002.10.2) Emittance (50 GeV) ： εH = 2.7π, εV = 6.3π Full Acceptance ： εH = 10.3π, εV = 24.4π mm・ mr

Q 1 A 5 . 8 4 5 Q 2 A

• 4

. 2 5 7 B 1 A 1 9 . 7 7 6 B 1 B 1 9 . 7 7 6 Q 3 A 4 . 6 2 8 Q 4 A

• 7

. 9 4 2 Q 4 C

• 7

. 9 4 2 Q 5 A 8 . 3 2 2 Q 5 C 8 . 3 2 2 B 2 A 1 9 . 7 7 6 B 2 B 1 9 . 7 7 6 B 3 V 1 5 . 4 6 B 3 V 1 5 . 4 6 Q 6 A 7 . 3 1 6 Q 6 C 7 . 3 1 6 Q 7 A

• 7

. 3 1 6 Q 7 C

• 7

. 3 1 6 Q 8 . Q 9 A 7 . 3 1 6 Q 9 C 7 . 3 1 6 Q A A

• 7

. 3 1 6 Q A C

• 7

. 3 1 6 Q 1 1 A 7 . 3 5 4 Q 1 2 A

• 6

. 7 8 2 Q 1 3 A 1 . 6 2 2 Q 1 4 A

• 7

. 8 9 6 Q 1 4 C

• 7

. 8 9 6 B 4 V 1 5 . 4 6 B 4 V 1 5 . 4 6 Q 1 5 A 6 . 9 5 8 Q 1 6 A

• 7

. 2 4 2 Q 1 6 C

• 7

. 2 4 2 Q 1 7 A 8 . 1 2 Q 1 7 C 8 . 1 2 Q 1 8 B

• 1

. 3 8 Q 1 9 A 1 . 5 8 4 Q 1 9 C 1 . 5 8 4 Q 1 A A

• 1

. 8 2 5 Q 1 A C

• 1

. 8 2 5 Q 1 B A 7 . 1 2 1 Q 1 C A

• 8

. 6 3 9 Q 1 D A 7 . 1 2 1 D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D M P 1 D M P 2 D R F T D R F T D R F T D R F T

Beam Envelope（ 30 GeV SEB:εH=4.4π / εV=10.4π mm・ mr） 8cm 8cm (H) (V) 260m 0m Q 1 Q Q 1 1 Q Q 1 1 B e a m D u m Q Q 1 1 Q Q 1 1 210m 100m 60m 150m T T S M M P # of nodes : 4 Switch Yard Matching S. NP-Hall

3

• G

e V B e a m P r

• f

i l e ＠T 1 （ T U R T L E )

X(cm) Y(cm) θ(mr) φ(mr)

σy = 1.4mm σx = 0.8mm

Q 1 A 5 . 8 4 5 Q 2 A

• 4

. 2 5 7 B 1 A 1 9 . 7 7 6 B 1 B 1 9 . 7 7 6 Q 3 A 4 . 6 2 8 Q 4 A

• 7

. 9 4 2 Q 4 C

• 7

. 9 4 2 Q 5 A 8 . 3 2 2 Q 5 C 8 . 3 2 2 B 2 A 1 9 . 7 7 6 B 2 B 1 9 . 7 7 6 B 3 V 1 5 . 4 6 B 3 V 1 5 . 4 6 Q 6 A 7 . 3 1 6 Q 6 C 7 . 3 1 6 Q 7 A

• 7

. 3 1 6 Q 7 C

• 7

. 3 1 6 Q 8 . Q 9 A 7 . 3 1 6 Q 9 C 7 . 3 1 6 Q A A

• 7

. 3 1 6 Q A C

• 7

. 3 1 6 Q 1 1 A 7 . 3 5 4 Q 1 2 A

• 6

. 7 8 2 Q 1 3 A 1 . 6 2 2 Q 1 4 A

• 7

. 8 9 6 Q 1 4 C

• 7

. 8 9 6 B 4 V 1 5 . 4 6 B 4 V 1 5 . 4 6 Q 1 5 A 6 . 9 5 8 Q 1 6 A

• 7

. 2 4 2 Q 1 6 C

• 7

. 2 4 2 Q 1 7 A 8 . 1 2 Q 1 7 C 8 . 1 2 Q 1 8 B

• 1

. 3 8 Q 1 9 A 1 . 5 8 4 Q 1 9 C 1 . 5 8 4 Q 1 A A

• 1

. 8 2 5 Q 1 A C

• 1

. 8 2 5 Q 1 B A 5 . 4 5 5 Q 1 C A

• 6

. 9 1 1 Q 1 D A 5 . 4 5 5 D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D M P 1 D M P 2 D R F T D R F T D R F T D R F T

T 1 8cm 8cm T S M M P (H) (V) 260m 0m Q 1 8 Q Q 1 1 7 7 Q Q 1 1 9 9 B e a m D u m p Q Q 1 1 C C Q Q 1 1 D D Beam Envelope（ 50 GeV SEB:εH=2.7π / εV=6.3π mm・ mr）

5

• G

e V B e a m P r

• f

i l e ＠T 1 （ T U R T L E )

X(cm) Y(cm) θ(mr) φ(mr)

σy = 1.1mm σx = 0.6mm

Q 1 A 5 . 8 4 5 Q 2 A

• 4

. 2 5 7 B 1 A 1 9 . 7 7 6 B 1 B 1 9 . 7 7 6 Q 3 A 4 . 6 2 8 Q 4 A

• 7

. 9 4 2 Q 4 C

• 7

. 9 4 2 Q 5 A 8 . 3 2 2 Q 5 C 8 . 3 2 2 B 2 A 1 9 . 7 7 6 B 2 B 1 9 . 7 7 6 B 3 V 1 5 . 4 6 B 3 V 1 5 . 4 6 Q 6 A 7 . 3 1 6 Q 6 C 7 . 3 1 6 Q 7 A

• 7

. 3 1 6 Q 7 C

• 7

. 3 1 6 Q 8 . Q 9 A 7 . 3 1 6 Q 9 C 7 . 3 1 6 Q A A

• 7

. 3 1 6 Q A C

• 7

. 3 1 6 Q 1 1 A 7 . 3 5 4 Q 1 2 A

• 6

. 7 8 2 Q 1 3 A 1 . 6 2 2 Q 1 4 A

• 7

. 8 9 6 Q 1 4 C

• 7

. 8 9 6 B 4 V 1 5 . 4 6 B 4 V 1 5 . 4 6 Q 1 5 A 6 . 9 5 8 Q 1 6 A

• 7

. 2 4 2 Q 1 6 C

• 7

. 2 4 2 Q 1 7 A 8 . 1 2 Q 1 7 C 8 . 1 2 Q 1 8 B

• 1

. 3 8 Q 1 9 A 1 . 5 8 4 Q 1 9 C 1 . 5 8 4 Q 1 A A

• 1

. 8 2 5 Q 1 A C

• 1

. 8 2 5 Q 1 B A 1 . 7 2 Q 1 C A

• 1

3 . 2 4 6 Q 1 D A 1 . 7 2 D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D R F T D M P 1 D M P 2 D R F T D R F T D R F T D R F T

T 1 8cm 8cm T S M M P (H) (V) 260m 0m Q 1 8 Q Q 1 1 7 7 Q Q 1 1 9 9 B e a m D u m p Q Q 1 1 C C Q Q 1 1 D D Beam Envelope(Full Acceptance: εH=10.3π /εV=24.4π mm・ mr)

S u m m a r y

• 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: εH = 10.3π /εV = 24.4π mm・ mr Expected Emittance εH=4.4π / εV=10.4π for 30-GeV SEB εH=2.7π / εV= 6.3π for 50-GeV SEB ○Beam Profile @ T1 σx = 0.8mm、 σｙ = 1.4mm (30 GeV) σx = 0.6mm、 σｙ = 1.1mm (50 GeV)

Secondary Beam Line

S u m m a r y

• 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

• n

d a r y B e a m L i n e s

All to be realized in J-PARC DAY-1 & PHASE-I recommended by NPFC(Jun/2003)

Phase-1 K1.8 YN scattering 07 Phase-1 HR High Res. Hyp. Nucl. Spectroscopy 08 Phase-1 K1.1BR/HR n-rich Hyp. Nucl. Spectroscopy 09 Day-1 K1.1BR/K1.1 K-bar Nucleus Spectroscopy 10 Phase-1 K1.1/K1.1BR Weak Decay 21 Day-1 K1.8/K1.1 S=-2 & -1 Nucl. Spectroscopy 06 Recomm. Beam Line theme LoI #

K1.8 K1.1BR K1.1 2003/09/04 HR K1.8 K1.1 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 φ6mm
• Target

Ni t5.4cm (λint~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

by Sanford-Wang Choice of the Extraction Angle

2 4 6 8 1 1 2 2 4 6 8 1 K

• .

6 G e V / c K

• .

8 G e V / c K

• 1

. G e V / c K

• 1

. 2 G e V / c K

• 1

. 4 G e V / c K

• 1

. 6 G e V / c K

• 1

. 8 G e V / c K

• 2

. G e V / c

2 4 6 8 1 1 2 2 4 6 8 1

K- (50 GeV) K- (30 GeV) Relative Yield (deg.) (deg.) K- Angular Distribution in 0.6~2.0 GeV/c

K1.8 Layout

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

D 1 1 4 . 5 5 4 Q 1 8 . 8 Q 2

• 8

. 2 8 6 D 2 1 9 . 4 6 Q 3 9 . 4 9 9 Q 4

• 1

. 3 4 9 S 1

• .

3 4 7 S 2

• 1

. 9 6 Q 5

• 7

. 7 9 Q 6 8 . 4 D 3 1 5 . 6 8 4 S 3

• 1

. 7 1 1 Q 7

• 6

. 5 2 S 4 . 3 2 7 Q 9

• 7

. 5 Q 1 5 . 4 5 1 Q 1 2

• 1

. 9 7 3 D 4 1 6 . 6 7 8 Q 1 3

• 5

. 6 8 8 Q 1 4 9 . 3 7 2 C O L I F C M 1 S E P 1 C M 2 V F 1 C M 3 S E P 2 C M 4 V F 2 V O V O Q V I F F C O L I F C M 1 S E P 1 C M 2 V F 1 C M 3 S E P 2 C M 4 V F 2 V O V O Q V I F F FF

MS1 ES1 Vertical Horizontal 10 10 5 15 5 10 15 cm 20 30

D1 Q1 Q2 D2 Q3 Q4 D3 D4 Q5 Q6 S1 S2 Q7 Q8 Q10 Q9

MS2 40 50m

S3 S4 Q11 Q12

45.694m cm ES2 IF Beam Analyzer

“IF-Type” K1.8

TRANSPORT(2nd Order) 5 10 15 cm/% dispersion Beam Envelope

Performance of K1.8

○“IF-Type” F.E.＋ Separation（ D.S.） ＋Beam Analyzer (1) Intermediate Focus (IF) Vacuum Independence of Primary BL with 2ndary BL V magnification(my)~ -0.4@IF → Shorten BL length (2) Better Purity K/p＞2 @1.8GeV/c (Decay TURTLE) ES Separator(6 m × 750kV/10 cm) × 2 my~ 0.4@MS1, -0.8@MS2 → Shorten BL length 2nd order aberration correction by 4 Sextupoles ＠MS1,2 (3) Good Beam Momentum Resolution ∆p/p~0.03% in σ (1st Order Resolution) (4) Intense Kaon Beam IK- ~ 1.3E+7 ppp (50-GeV 15µA 3.42s rep.: Sanford-Wang)

Layout Plan around T1 K1.8 （ High Vac.）

• Vac. Chamber

（ Low Vac） K1.1 （ High Vac.） Collimator Primary Beam NEED Vacuum Window btwn T1 and K1.8

K/π Separation －in case of “IF-type”－

SUS50µm foil at IF Y at MS1 Y at MS1 π- K- π- K-

K/π~1/6.2 （ MS1±1mm） K/π~1/6 （ MS1±1mm） K/π~193/0 at FF K/π~202/0 at FF

• Vac. Window NO effect on K/π

No window

“Non-IF Type” K1.8

D 1 1 4 . 5 5 4 Q 1 6 . 5 1 8 Q 2

• 7

. 3 3 4 D 2 1 9 . 4 6 S 1 . 2 S 2

• .

6 1 4 Q 3

• 5

. 5 9 8 Q 4 5 . 9 D 3 2 1 . 1 6 8 S 3

• 2

. 1 1 Q 6

• 4

. 3 1 8 S 4 . 6 9 Q 7

• 7

. 5 Q 8 4 . 2 8 3 Q 1

• 1

. 1 4 8 D 4 1 6 . 6 7 8 Q 1 1

• 5

. 7 5 Q 1 2 9 . 3 9 7 C O L C M 1 S E P 1 C M 2 V F 1 D 3 S 3 C M 3 S E P 2 C M 4 G A P V F 2 V O V O Q V I F F

FF MS1 ES1 Vertical Horizontal 10 10 5 15 5 10 15 cm cm 20 30

D1 Q1 Q2 D2 Q3 Q4 D3 D4 Q5 Q6 S1 S2 Q7 Q8 Q10 Q9

MS2 40 50m 42.35m

S3 S4

ES2

Y at MS1 Y at MS1 π- K- π - K-

K/π~1/20.6 （ MS1±1mm） K/π~1/4.5 （ MS1±1mm） K/π~558/0 at FF K/π~355/6 at FF

K/π Separation －in case of “Non-IF type”－

SUS50µm foil btwn Q1-Q2

• Vac. Window DOES affect K/π

No window

Histogram No 27 (lin) at z= 34.235 m (FGY7) y (cm) Counts Mean = 0.013 RMS = 0.139 Sum = 746

• 1
• 0.5

0.5 1 10 20 30 40 50 60 70 80 90 100 110 120 28-Jul-03 23:02:59 Histogram No 27 (lin) at z= 34.235 m (FGY7) y (cm) Counts Mean = 0.664 RMS = 0.063 Sum = 2067

• 1
• 0.5

0.5 1 100 200 300 400 500 600 700 28-Jul-03 23:04:58

K1.8 – K/π separation (simulation) K π σy = 1.4mm ES1=ES2=750kV/10cm ∆y~6.6mm σy = 0.63mm 6m x 2 T346=0 T324=0 @ MS2 by S3,S4 S=∆y/σy ~ 10 K & π y-profile @ MS2 (TURTLE 2nd Order) Simulated K/π ~ infinite (in 105 events generated)

Histogram No 34 (lin) at z= 44.216 m (FGX8) x (cm) Counts Mean = 0.051 RMS = 3.023 Sum = 7728

• 20
• 10

10 20 100 200 300 400 500 600 700 800 900 1000 1100 1200 28-Jul-03 22:29:05 Histogram No 36 (lin) at z= 44.216 m (FGY8) y (cm) Counts Mean = 0.154 RMS = 0.473 Sum = 7728

• 10
• 8
• 6
• 4
• 2

2 4 6 8 10 500 1000 1500 2000 2500 3000 28-Jul-03 22:29:49

K1.8 @ FF Beam Profile @ FF (TURTLE 2nd Order) R12~R34~R16~0 R11=-1.13, R33=1.28 @ FF σx = 30mm σy = 4.7mm 1.3E+07 ppp# K− Int. at 1.8 GeV/c 2.9 msr.% Acceptance 45.694 m Total Length

# 50 GeV-15µA proton beam, ppp: 1 pulse 3.42s Sanford-Wang formula

○ Beam Analyzer (Vo→Vi): R11=-0.174, R12=0 R16=0.725 cm/% ○ 1st Order Resolution dp=sqrt(1+R112)dx/R16=0.03% for dx=0.02cm (typical pos. res. in σ)

B e a m M

• m

e n t u m A n a l y z e r

K1.8 Summary

○“IF-Type” “double-stage separated” Beam Line with “Momentum Analyzer” Total Length: 45.7m K- intensity @ 1.8 GeV/c: 1.3ｘ １ ０

7ppp

K−/π−~infinite (Decay TURTLE 2nd Order) “cloud π” has yet to be estimated. ○To be done (in Beam Optics)

• 1. Higher order (3rd order effect)
• 2. “cloud π” / “Scattered π”

→GEANT

K1.8BL Simulation by GEANT4

• T. Takahashi
• Y. Sato

K1.1BR

Layout Option - K1.8+K1.1BR T1 TGT MS2 MS1 IF K1.8 K1.1BR SKS SPES-II ES1 ES2

☆Shorter BL for K survival in lower mom. ☆Time Sharing with K1.8 exp.

D 1 1 4 . 5 5 4 Q 1 8 . 8 Q 2

• 8

. 2 8 6 D 2 1 9 . 4 6 Q 3 9 . 4 9 9 Q 4

• 1

. 3 4 9 S 1

• .

3 4 7 S 2

• 1

. 9 6 Q 5

• 7

. 7 9 Q 6 8 . 4 D 3 1 5 . 6 8 4 S 2 3 . 4 3 6 Q 7

• 1

1 . 8 5 D 4 1 3 5 . 1 4 2 D 4 2 3 5 . 1 4 2 D 4 3 3 5 . 1 4 2 D 4 4 3 5 . 1 4 2 Q 8 1 3 . 9 9 8 C O L I F C M 1 S E P 1 C M 2 V F 1 V I F F C O L I F C M 1 S E P 1 C M 2 V F 1 V I F F

FF MS1 ES1 Vertical Horizontal 10 10 5 15 5 10 15 cm cm 20

D0 Q1 Q2 D1 Q3 Q4 D2 D3 Q5 Q6 S1 S2 S3 Q7 Q8

IF 26.973m K1.1BR Beam Envelope 30m 5 10 15 cm/% dispersion Beam Analyzer TRANSPORT(2nd Order) Shared with K1.8

Histogram No 18 (lin) at z= 19.500 m (FGY6) y (cm) Counts Mean = -0.699 RMS = 0.094 Sum = 10749

• 1
• 0.5

0.5 1 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 28-Jul-03 22:56:56 Histogram No 18 (lin) at z= 19.500 m (FGY6) y (cm) Counts Mean = -0.004 RMS = 0.084 Sum = 1472

• 1
• 0.5

0.5 1 50 100 150 200 250 300 350 400 28-Jul-03 22:58:54

K & π y-profile @ MS1 (TURTLE 2nd Order) K π σy = 0.84mm ES1=500kV/10cm ∆y~7mm 2m T346=0 T324=0 @ MS1 by S1,S2 σy = 0.94mm S =∆y/σy ~ 7.4 K1.1BR – K/π separation (simulation) Simulated K/π ~ infinite (in 105 events generated) c.f. S~6.4 in K2 “Cloud π” would be significant! BUT

Histogram No 27 (lin) at z= 26.973 m (FGY8) y (cm) Counts Mean = 0.046 RMS = 0.256 Sum = 13021

• 10
• 8
• 6
• 4
• 2

2 4 6 8 10 1000 2000 3000 4000 5000 6000 7000 28-Jul-03 22:48:33 Histogram No 25 (lin) at z= 26.973 m (FGX8) x (cm) Counts Mean = 0.148 RMS = 1.454 Sum = 13021

• 20
• 10

10 20 500 1000 1500 2000 2500 3000 3500 4000 28-Jul-03 22:49:12

Beam profile @ FF (TURTLE 2nd Order) σx = 14.5mm K1.1BR σy = 2.6mm R34=0 R33=-1.17 @ FF σy @ FF minimized by S3 1.1E+07 ppp# K− Int. at 1.1 GeV/c 4.8 msr.% Acceptance 26.973 m Total Length

# 50 GeV-15µA proton beam, ppp: 1 pulse 3.42s Sanford-Wang formula

○ Beam Analyzer (Vo→FF): R11=-0.36, R12=0 R16= 1.06 cm/% ○ 1st Order Resolution dp=sqrt(1+R112)dx/R16 =0.02% for dx=0.02cm (typical pos. res. in σ)

B e a m M

• m

e n t u m A n a l y z e r

K1.1

IF K1.8 K1.1 SPES-II T1 TGT Layout Option - K1.1 MS1 MS2 K0

☆Double-Stage Separation for better K/π ☆Shorter BL for K survival

D 1 1 4 . 2 3 1 Q 1 9 . 3 Q 2

• 1

1 . 3 9 3 D 2 1 5 . 3 7 5 Q 3 8 . 4 O 1 . Q 4

• 8

. 9 2 6 S 1 . 5 7 S 2

• 1

. 3 9 5 Q 5

• 8

. 9 6 Q 6 8 . 3 5 3 D 2 P 2 1 8 . 5 7 2 O 2 . Q 7

• 6

. 3 8 5 S 3

• 1

. 1 9 3 S 4 . 7 5 1 Q 8

• 9

. 9 3 3 Q 9 9 . 6 1 7 D 3 1 7 . 9 2 7 Q 1

• 8

. 6 5 5 Q 1 1 1 . 4 8 C O L S E P 1 M S 1 S E P 2 M S 2 F F

Vertical Horizontal 10 5 15 5 10 15 cm cm ES1 ES2 FF MS2 MS1

D0 Q1 Q2 D1 Q3 Q4 D2 D3 Q5 Q6 S1 S2 O2 S4 Q8 Q7 S3 Q10 Q9

10 20 30m

Q11

IF dispersion 5 10 15 cm/% 26.19m K1.1 Beam Envelope TRANSPORT(2nd Order)

O1

Histogram No 20 (lin) at z= 13.350 m (FGY6) y (cm) Counts Mean = -0.007 RMS = 0.143 Sum = 17182

• 1
• 0.5

0.5 1 500 1000 1500 2000 2500 3000 3500 4000 06-Sep-03 20:20:10 Histogram No 32 (lin) at z= 21.250 m (FGY7) y (cm) Counts Mean = 0.005 RMS = 0.148 Sum = 3562

• 1
• 0.5

0.5 1 100 200 300 400 500 600 700 800 06-Sep-03 20:14:09

K1.1 Kaon y-profile @ MS1, 2 (TURTLE 3rd Order) ES1=ES2=750kV/10cm 2m x 2 T346=0 T324=0 @ MS1 by S1,S2 σy @ MS1 minimized by O1 T346=0 T324=0 @ MS2 by S3,S4 σy @ MS2 minimized by O2 MS1 MS2 σy = 1.5mm σy = 1.4mm

Histogram No 32 (lin) at z= 21.250 m (FGY7) y (cm) Counts Mean = 0.515 RMS = 0.186 Sum = 2668

• 1
• 0.5

0.5 1 50 100 150 200 250 300 350 400 06-Sep-03 20:32:16 Histogram No 20 (lin) at z= 13.350 m (FGY6) y (cm) Counts Mean = -0.273 RMS = 0.143 Sum = 70025

• 1
• 0.5

0.5 1 2000 4000 6000 8000 1E+004 1.2E+004 1.4E+004 06-Sep-03 20:29:04

ES1=ES2=750kV/10cm 2m x 2 π π MS1 MS2 Contamination due to Higher Order Aberration Pion y-profile @ MS1, 2 (TURTLE 3rd Order) π ∆y~5.1mm σy = 1.9mm S =∆y/σy ~ 2.7 Simulated K/π ~ 1.7 (in 106 events generated) K1.1 – K/π separation (simulation)

Histogram No 41 (lin) at z= 25.818 m (FGY8) y (cm) Counts Mean = -0.003 RMS = 0.161 Sum = 1353

• 10
• 8
• 6
• 4
• 2

2 4 6 8 10 100 200 300 400 500 600 700 800 06-Sep-03 20:25:50 Histogram No 39 (lin) at z= 25.818 m (FGX8) x (cm) Counts Mean = -0.117 RMS = 0.576 Sum = 1353

• 20
• 10

10 20 100 200 300 400 500 600 700 06-Sep-03 20:16:59

K11 Beam Profile @ FF (TURTLE 3rd Order) σx = 6mm σy = 1.6mm R12=R34=0 R11=0.635 R33=0.682 R16=R26=0 @ FF 1.2E+07 ppp# K− Int. at 1.1 GeV/c 4.4 msr.% Acceptance 25.818 m Total Length

# 50 GeV-15µA proton beam, ppp: 1 pulse 3.42s Sanford-Wang formula

K1.1BR and K1.1 Summary

○ K1.1BR “Time sharing with K1.8 Exp.” Total Length: 27m K− intensity @ 1.1 GeV/c: 1.1ｘ １ ０

7ppp

⇒ 1 order of mag. .gt. K− @ K1.8 K−/π−~infinite (Decay TURTLE 2nd Order) “cloud π” has yet to be estimated ○ K1.1 “IF” “Double-Stage Separation” “Achromatic” Total Length: 25.8m K− intensity @ 1.1 GeV/c: 1.2ｘ １ ０

7ppp

K−/π−~1.7 (Decay TURTLE 3rd Order) “cloud π” has yet to be estimated 2003/09/10

HR

Layout Option - K1.8+HR T1 TGT MS2 MS1 IF K1.8 HR SKS ES1 ES2 MS-H

D 1 1 4 . 5 5 4 Q 1 8 . 8 Q 2

• 8

. 2 8 6 D 2 1 9 . 4 6 Q 3 9 . 4 9 9 Q 4

• 1

. 3 4 9 S 1

• .

1 2 3 S 2

• 3

. 5 6 8 Q 5

• 7

. 7 9 Q 6 8 . 4 D 3 1 5 . 6 8 4 D 3 P 2 4 . 6 6 6 Q 7 7 . 8 2 Q 8

• 8

. 9 9 9 S 3 2 . 8 9 8 D 4 1 3 5 . 1 4 2 D 4 2 3 5 . 1 4 2 D 4 3 3 5 . 1 4 2 D 4 4 3 5 . 1 4 2 Q 9 7 . 7 7 Q 1

• 1

4 . 1 3 Q 1 1 1 3 . 2 4 7 Q 1 9 . 7 2 9 S X 1 1 . 3 9 D 5 1 2 4 . D 5 2 2 4 . Q 1 2 9 . 8 3 7 Q 1 3 9 . 4 8 3 Q 1 4 9 . 4 8 3 S X 4 2 . 6 3 8 D 6 1 2 4 . D 6 2 2 4 . Q 1 6 9 . 8 3 7 Q 1 7 9 . 7 2 9 C O L I F C M 1 S E P 1 C M 2 V F 1 V O F F C O L I F C M 1 S E P 1 C M 2 V F 1 V O F F

Vertical (cm) Horizontal (cm) 10 20 20 10 ES1 MS-H IF FF R12=-1.136 R33=-0.375 R36=-10.614 cm/% Length=48.211m Beam Analyzer Dispersion(H) Dispersion(V) MS1 HRビームラ イ ン TRANSPORT(2nd Order) 50m 10 20 cm/%

HR

• Mom. Res.~0.01%
• Mom. Bite~±1%

Ω・ ∆P~4 msr・ % BL Length~48m π Int.~1.2E+9 pps High-resolution Spectroscopy ∆p/p~10-4 ∆E~0.2 MeV

Beam Line Specifications Summary (preliminary)

<0.01

• 5MV/m

6m×1 4100E+06 4 48.21 HR 3.1E+06 2.1E+06 0.8 GeV/c 7.5MV/m 2m×2 5MV/m 6m×1 7.5MV/m 6m×2 Electro-static Separator

• 0.02

0.03

• Mom. Resol.(% in σ)

1.7$ Inf.$ Inf.$ K−/π−(D.Turtle) 12E+06 11E+06 0.75E+06 1.1 GeV/c 13E+06 1.8 GeV/c K−(π) Intensity (ppp)# 4.4 4.8 2.9 Acceptance (msr.%) 25.82 26.973 45.694 Length (m) K1.1 K1.1BR K1.8

# assuming 1pulse=3.42s（ 0.7s flat top), 50GeV-15µA p Beam $ Cloud π not included 2003/09/10