![Page 1: Status of J-PARC facility (introduction) · 2003. 12. 3. · T.Kobayashi (KEK) NBI2003 Nov. 7-11, 2003 16 HK SK 3° 2° 3° 2° DV center) 3° 2° 0.02° 1.51° 0.784° Decay pipe](https://reader033.vdocuments.us/reader033/viewer/2022060100/60afae08e6dee16a986092b6/html5/thumbnails/1.jpg)
Nov. 7-11, 2003NBI2003 1T.Kobayashi (KEK)
Status of JStatus of J--PARC PARC νν facilityfacility(introduction)(introduction)
Takashi Kobayashi(IPNS, KEK)
[email protected], 2003
![Page 2: Status of J-PARC facility (introduction) · 2003. 12. 3. · T.Kobayashi (KEK) NBI2003 Nov. 7-11, 2003 16 HK SK 3° 2° 3° 2° DV center) 3° 2° 0.02° 1.51° 0.784° Decay pipe](https://reader033.vdocuments.us/reader033/viewer/2022060100/60afae08e6dee16a986092b6/html5/thumbnails/2.jpg)
Nov. 7-11, 2003NBI2003 2T.Kobayashi (KEK)
Next generation LBL experiments in JapanNext generation LBL experiments in Japan““JJ--PARCPARC--KamiokaKamioka neutrino projectneutrino project””
νµ beam of ~1GeVKamioka
JAERI(Tokai-mura)
ννµµ→→ ννxx disappearanceννµµ→→ ννee appearanceNC measurement
0.75 MW 50 GeV PS
Super-K: 50 ktonWater Cherenkov
~Mt “Hyper Kamiokande”
4MW 50GeV PS
CPVproton decay
1st Phase (x102 of K2K)2nd Phase
![Page 3: Status of J-PARC facility (introduction) · 2003. 12. 3. · T.Kobayashi (KEK) NBI2003 Nov. 7-11, 2003 16 HK SK 3° 2° 3° 2° DV center) 3° 2° 0.02° 1.51° 0.784° Decay pipe](https://reader033.vdocuments.us/reader033/viewer/2022060100/60afae08e6dee16a986092b6/html5/thumbnails/3.jpg)
Nov. 7-11, 2003NBI2003 3T.Kobayashi (KEK)
Sensitivities in first phase(5yrs)Sensitivities in first phase(5yrs)
δ(si
n2 2θ 2
3)δ(
∆m23
2)
0.01
1×10-4
True ∆m232 (eV2)
δ(sin22θ)~0.01 in 5 yearsδ(∆m2) ~<1×10-4 in 5 years
OAB-2degree
Search for νe appearance νµ disappearance
excludedby reactor
132
2322 2sinsin2sin θθθµ ⋅≡e
~0.5Sensitive sin22θ13>0.006 (90%)
sin22θ13>0.018 (3σ)w/ beam MC sim, & full SK det. sim.
x20
![Page 4: Status of J-PARC facility (introduction) · 2003. 12. 3. · T.Kobayashi (KEK) NBI2003 Nov. 7-11, 2003 16 HK SK 3° 2° 3° 2° DV center) 3° 2° 0.02° 1.51° 0.784° Decay pipe](https://reader033.vdocuments.us/reader033/viewer/2022060100/60afae08e6dee16a986092b6/html5/thumbnails/4.jpg)
Nov. 7-11, 2003NBI2003 4T.Kobayashi (KEK)
JHF-HK CPV Sensitivity
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1sinδ
sin2 2θ
13
no BGsignal stat only
(signal+BG) stat only
stat+2%syst.stat+5%syst.
stat+10%syst.
CHOOZ excludedsin22θ13<0.12@∆m31
2~3x10-3eV2
JHF 3σ discovery
3σ CP sensitivity : |δ|>20o for sin22θ13>0.01 with 2% syst.
CP sensitivity (3CP sensitivity (3σσ) in 2) in 2ndnd phase phase
![Page 5: Status of J-PARC facility (introduction) · 2003. 12. 3. · T.Kobayashi (KEK) NBI2003 Nov. 7-11, 2003 16 HK SK 3° 2° 3° 2° DV center) 3° 2° 0.02° 1.51° 0.784° Decay pipe](https://reader033.vdocuments.us/reader033/viewer/2022060100/60afae08e6dee16a986092b6/html5/thumbnails/5.jpg)
Nov. 7-11, 2003NBI2003 5T.Kobayashi (KEK)
400MeV Linac
3GeV PS
50Ge
V PS
(0.7
5MW
)
N
FD
Neutrino Beam Line
To SK
Construction2001~2007 JFY
5.2750Power(kW)
0.450.275Rate(Hz)
6330Int.(1012ppp)
1250E(GeV)
K2KJ-PARC
JAERI@Tokai-mura(60km N.E. of KEK)
(Approved in Dec.2000)
Pacific Ocean
JJapanapan--PProtonrotonAAceeleratorceeleratorRResearchesearchCComplexomplex facilityfacility(formerly known as JHF)
![Page 6: Status of J-PARC facility (introduction) · 2003. 12. 3. · T.Kobayashi (KEK) NBI2003 Nov. 7-11, 2003 16 HK SK 3° 2° 3° 2° DV center) 3° 2° 0.02° 1.51° 0.784° Decay pipe](https://reader033.vdocuments.us/reader033/viewer/2022060100/60afae08e6dee16a986092b6/html5/thumbnails/6.jpg)
Nov. 7-11, 2003NBI2003 6T.Kobayashi (KEK)
JJ--PARC site & Salt farmPARC site & Salt farm
昔の塩田跡
September, 2003
![Page 7: Status of J-PARC facility (introduction) · 2003. 12. 3. · T.Kobayashi (KEK) NBI2003 Nov. 7-11, 2003 16 HK SK 3° 2° 3° 2° DV center) 3° 2° 0.02° 1.51° 0.784° Decay pipe](https://reader033.vdocuments.us/reader033/viewer/2022060100/60afae08e6dee16a986092b6/html5/thumbnails/7.jpg)
Nov. 7-11, 2003NBI2003 7T.Kobayashi (KEK)
PV2PQ5
PQ2A
PQ4A
PH3 PQ4BPQ3B
PV1PD21.92 deg. bend
PQ3APQ2B PH1
1.9 2 deg. bend
PQ1
PD1 PH2
コン
プレ
ッサ
ー室
冷凍
機室
カー
ドル
置場
液体
窒素
タン
ク
バッファタンク
電気
室
NM1低温棟
5,800l/min(低温設備) 980l/min(磁石電源)
NM2
ヤード
~4,500l/min(磁石汚染)
トンネル空調TS換気
電気
ヤー
ド
機械ヤード
冷却棟
4%slope
保安林伐採エリア
ND1
ND2
μピ
ット
1鉄
置場
μピット
測定室
電源ヤード
DQ2
DD2
Horn1
DD1
DQ1
DD3
DQ3 DQ4
Horn2
電源室
シャ
ッタ
ー
電気室
DSV DSH
サブトンネルA
サブトンネルB
サブ
トンネ
ルC
サブ
トン
ネル
D
輸送道路レベルTP+9.3mへ。
土盛り上面はTP+10.8m保存するため法面発生。
ニュートリノ建屋を輸送道路側へ3m、8間道路から
離れる方向へ5m移動。(020207小林隆)
建屋壁面より5m離れたところまで保安林伐採。
伐採面積計:0.286haSM1 ST1
SM2ST2
ST3 ST4
UD1
UQ3
UQ1 UQ2
UV1 UV2
UH3
UH2
UQ4電源棟UQ5
UD2 UH1
制御室
出入管理
WC
WC
適当
な広
さ
37.5
m4%
slope
放射
化物
保管
室
2.4 3.63.03.6 2.4
13.5
μピ
ット1
3.0
20.0
6.6
3.0
6.6
30.0
5.65.6
3.0
4.64.6
4.57.0
3.5
15.0
5.0 5.0 5.0 μピ
ット2
2 .50
2 .00
8.00
4.00
2 .50
1.50
3.00
3.50
1. 50 1.5 0
2.00
3. 50
60.0
130.0
25,000
decay pipe
Near detector
TargetStation
µ-pit280m
130m
3NBT
Neutrino beam facility OverviewNeutrino beam facility Overview
(1% dump)Proton beam transport
Normal conducting magnetsSuperconducting arc
Proton beam monitors Target/Horn systemDecay pipe (130m) cross w/ 3NBT
Cover OA angle 2~3 deg. Beam dumpmuon monitors2 near detectors (280m/~2km)
(*)LBL GPS survey finished.
Components
Technical Design&Development (Status) Reporthttp://jnusrv01.kek.jp/jnu/nu-TAC/
1% dump
![Page 8: Status of J-PARC facility (introduction) · 2003. 12. 3. · T.Kobayashi (KEK) NBI2003 Nov. 7-11, 2003 16 HK SK 3° 2° 3° 2° DV center) 3° 2° 0.02° 1.51° 0.784° Decay pipe](https://reader033.vdocuments.us/reader033/viewer/2022060100/60afae08e6dee16a986092b6/html5/thumbnails/8.jpg)
Nov. 7-11, 2003NBI2003 8T.Kobayashi (KEK)
Beam kinetic energy 50GeV (40GeV @ T=0)Protons/pulse 3.3x1014
Beam current 15µABeam power 750kW
Extraction Single turn fast extractionMicro structure 8bunches/9 RF buckets
Bunch width 58ns (full width)Bunch spacing 598ns
Spill width ~5µsCycle 3.53 sec
Proton beam emittance 6.1πmm.mrad# of normal cond. mags 20
# of supercond. mags 28 in 14 cryostatsPhysical acceptance 60πmm.mrad
Beam loss(proton transport) 1W/mCurvature of arc 104.4m
Decay pipe length (target-dump) 130m (from target)Distance to near detectors 280m/~2km
Distance to SK ~295kmTarget-SK beam decline -1.25deg
SpecificationSpecification
![Page 9: Status of J-PARC facility (introduction) · 2003. 12. 3. · T.Kobayashi (KEK) NBI2003 Nov. 7-11, 2003 16 HK SK 3° 2° 3° 2° DV center) 3° 2° 0.02° 1.51° 0.784° Decay pipe](https://reader033.vdocuments.us/reader033/viewer/2022060100/60afae08e6dee16a986092b6/html5/thumbnails/9.jpg)
Nov. 7-11, 2003NBI2003 9T.Kobayashi (KEK)
When 50GeVfast abort available: 3.53s
When fast abort not available: 4.1s
Acceleration cycleAcceleration cycle
![Page 10: Status of J-PARC facility (introduction) · 2003. 12. 3. · T.Kobayashi (KEK) NBI2003 Nov. 7-11, 2003 16 HK SK 3° 2° 3° 2° DV center) 3° 2° 0.02° 1.51° 0.784° Decay pipe](https://reader033.vdocuments.us/reader033/viewer/2022060100/60afae08e6dee16a986092b6/html5/thumbnails/10.jpg)
Nov. 7-11, 2003NBI2003 10T.Kobayashi (KEK)
““νν facility construction groupfacility construction group””
~26~5~8~2~5~1~5~1~3~2
S.Koike5, N.Sato5
T.Iwashita1
Nakadaira10 ~58
![Page 11: Status of J-PARC facility (introduction) · 2003. 12. 3. · T.Kobayashi (KEK) NBI2003 Nov. 7-11, 2003 16 HK SK 3° 2° 3° 2° DV center) 3° 2° 0.02° 1.51° 0.784° Decay pipe](https://reader033.vdocuments.us/reader033/viewer/2022060100/60afae08e6dee16a986092b6/html5/thumbnails/11.jpg)
Nov. 7-11, 2003NBI2003 11T.Kobayashi (KEK)
Special features of the JSpecial features of the J--PARC PARC νν facilityfacility•• Very high intensity (750kW), high peak power Very high intensity (750kW), high peak power
(~2.6MJ/5(~2.6MJ/5µµs~500GW)s~500GW)– Cooling: beam window, target, horn, target station wall, decay pipe
wall, beam dump!!– Shock wave: target, horn, beam window– Radiation
• Very thick shielding• Remote maintenance
•• Superconducting (SC) proton transportSuperconducting (SC) proton transport– small curvature, power consumption (cheaper operation)– Small beam loss required.
•• (SC) combined function (CF) magnets (New!)(SC) combined function (CF) magnets (New!)– Less number of magnets, less cost, and larger acceptance
•• ““OffOff--axisaxis”” (OA) beam(OA) beam– Low energy, high intensity, tunable narrow band beam.
![Page 12: Status of J-PARC facility (introduction) · 2003. 12. 3. · T.Kobayashi (KEK) NBI2003 Nov. 7-11, 2003 16 HK SK 3° 2° 3° 2° DV center) 3° 2° 0.02° 1.51° 0.784° Decay pipe](https://reader033.vdocuments.us/reader033/viewer/2022060100/60afae08e6dee16a986092b6/html5/thumbnails/12.jpg)
Nov. 7-11, 2003NBI2003 12T.Kobayashi (KEK)
FQ4
FQ3B
FQ3A
FH2
FV2
FV1
ビーム振り下げ
FQ2 B
F Q2 A
FH1
FQ1
PQ4BPH3
PV2PQ5
PV1 PQ3BPQ4A 1.92 deg. bend
PQ2B
PD2PQ3APD1
PQ1
1.92 deg. bend
PQ2A
ニュートリノ・ビームライン
PH1PH2
サスペンション型
クレーン(20t x 2)
Fast ext.(kicker, septum)1.125kW (0.15%)
Preparation section(ctrl’ed loss by collimator)
0.75kW (0.1%)
50GeV ring0.5W/m
Final Focusing section0.25kW (0.03%)
Primary linePrimary line
• 20 normal conducting magnets (prep.&FF sect.) 5 MIC mags.– Very high radiation environment
• 28 Superconducting CF magnets• Proton monitors
– CT for intensity– Loop pickup monitor (center)– SSEC/RGBPM for profile– Loss monitor
• Vacuum system– window
![Page 13: Status of J-PARC facility (introduction) · 2003. 12. 3. · T.Kobayashi (KEK) NBI2003 Nov. 7-11, 2003 16 HK SK 3° 2° 3° 2° DV center) 3° 2° 0.02° 1.51° 0.784° Decay pipe](https://reader033.vdocuments.us/reader033/viewer/2022060100/60afae08e6dee16a986092b6/html5/thumbnails/13.jpg)
Nov. 7-11, 2003NBI2003 13T.Kobayashi (KEK)
Merit : reduce # of components
can increase # of (Q-)magnets. Smaller beam size
Coil configuration Bx = Q*y/r
By = D + Q*x/r
T.Ogitsu,
T.NakamotoCombined FunctionCombined Function
![Page 14: Status of J-PARC facility (introduction) · 2003. 12. 3. · T.Kobayashi (KEK) NBI2003 Nov. 7-11, 2003 16 HK SK 3° 2° 3° 2° DV center) 3° 2° 0.02° 1.51° 0.784° Decay pipe](https://reader033.vdocuments.us/reader033/viewer/2022060100/60afae08e6dee16a986092b6/html5/thumbnails/14.jpg)
Nov. 7-11, 2003NBI2003 14T.Kobayashi (KEK)
Off Axis BeamOff Axis Beam(ref.: BNL-E889 Proposal)
θTargetHorns Decay Pipe
Super-K.
Quasi Monochromatic Beamx2~3 intense than NBB
Exp’ed # of evts(1yr,22.5kt)~4500 νµ tot ~3000 νµ CC νe contamination ~0.2% at νµ peak
Expected spectrum(OAB2°)~102 x (K2K)
νµOA3°OA2°OA1°
Osc. Prob.=sin2(1.27∆m2L/Eν)
∆m2=3x10-3eV2
L=295km
Tuned at oscillation maximum
(OAB 2degree)
osc.
max
.
![Page 15: Status of J-PARC facility (introduction) · 2003. 12. 3. · T.Kobayashi (KEK) NBI2003 Nov. 7-11, 2003 16 HK SK 3° 2° 3° 2° DV center) 3° 2° 0.02° 1.51° 0.784° Decay pipe](https://reader033.vdocuments.us/reader033/viewer/2022060100/60afae08e6dee16a986092b6/html5/thumbnails/15.jpg)
Nov. 7-11, 2003NBI2003 15T.Kobayashi (KEK)
Target areaTarget area• Baffle (protect horn from mis-steering• Target (water cooled graphite)~3cmφx90cm, 60kJ/pulse : cooling
testing• 3xHorn (320kA). Conceptual design finished• He filled (reduce NOx/3H production) in Al vessel, wall cooloed• Remote maintenace (open ceiling)
Iron shield
Helium vessel
Machine room
Service pit
Sto
rage fo
r hig
hly
activ
ate
d s
tuff
Iron shield
Concrete block
Target/1st horn
Beam window
2nd horn 3rd horn
Final focus
Decay volume
Built-in concrete
Beam window
Baffle
22m 33m
11m40ton crane
GL
![Page 16: Status of J-PARC facility (introduction) · 2003. 12. 3. · T.Kobayashi (KEK) NBI2003 Nov. 7-11, 2003 16 HK SK 3° 2° 3° 2° DV center) 3° 2° 0.02° 1.51° 0.784° Decay pipe](https://reader033.vdocuments.us/reader033/viewer/2022060100/60afae08e6dee16a986092b6/html5/thumbnails/16.jpg)
Nov. 7-11, 2003NBI2003 16T.Kobayashi (KEK)
SKHK
3°
2°
3°
2°
DV center
)
3°
2°
1.51°0.02°
°0.784
Decay pipe common for SK/HKDecay pipe common for SK/HK
have to cover p/π beam axis -(3~4)degcorresponding to ∆m2=2.2~3.2x10-3eV2
Beam eye
SK
~10km
HK
Possible site for Hyper-K
3.11°(OAB2° beam axis)3.64°(OAB2.5°)4.16°(OAB3°)
Best Fit 3.43°(OAB2.3° Beam Axis)
Decay pipe
![Page 17: Status of J-PARC facility (introduction) · 2003. 12. 3. · T.Kobayashi (KEK) NBI2003 Nov. 7-11, 2003 16 HK SK 3° 2° 3° 2° DV center) 3° 2° 0.02° 1.51° 0.784° Decay pipe](https://reader033.vdocuments.us/reader033/viewer/2022060100/60afae08e6dee16a986092b6/html5/thumbnails/17.jpg)
Nov. 7-11, 2003NBI2003 17T.Kobayashi (KEK)
• Accommodate OA angle 2~3deg, common for SK/HK
• Shielding design finished. ~6m thick concrete• Civil engineering design finished• Engineering design for water cooling finished.
Boundary condition: Inner iron vessel: ∆T<30deg, concrete <100deg
• He vessel inside concrete shielid– Water cooled– Iron parts for 30m part made last year– Iron parts for 41.4m part will be made this year
3NBT
130m
5.4mOA2o
OA3o
Cooling simulation
Decay volume & Decay volume & muonmuon pitpitMuon mon.(Eth~5GeV
2004
![Page 18: Status of J-PARC facility (introduction) · 2003. 12. 3. · T.Kobayashi (KEK) NBI2003 Nov. 7-11, 2003 16 HK SK 3° 2° 3° 2° DV center) 3° 2° 0.02° 1.51° 0.784° Decay pipe](https://reader033.vdocuments.us/reader033/viewer/2022060100/60afae08e6dee16a986092b6/html5/thumbnails/18.jpg)
Nov. 7-11, 2003NBI2003 18T.Kobayashi (KEK)
2. Near detector @ 280m from target2. Near detector @ 280m from target
20mφ
36m
SK direction
beam center with 3° off-axis.6m
Grand Level
target position11m
3.7m
6.2mHK
Under conceptual design process
![Page 19: Status of J-PARC facility (introduction) · 2003. 12. 3. · T.Kobayashi (KEK) NBI2003 Nov. 7-11, 2003 16 HK SK 3° 2° 3° 2° DV center) 3° 2° 0.02° 1.51° 0.784° Decay pipe](https://reader033.vdocuments.us/reader033/viewer/2022060100/60afae08e6dee16a986092b6/html5/thumbnails/19.jpg)
Nov. 7-11, 2003NBI2003 19T.Kobayashi (KEK)
Civil construction schedule requested to MEXTCivil construction schedule requested to MEXT
04-0505-06
06-0707-08
• Five year plan• Most heavy construction comes last 2 years
Order is still uncertain
![Page 20: Status of J-PARC facility (introduction) · 2003. 12. 3. · T.Kobayashi (KEK) NBI2003 Nov. 7-11, 2003 16 HK SK 3° 2° 3° 2° DV center) 3° 2° 0.02° 1.51° 0.784° Decay pipe](https://reader033.vdocuments.us/reader033/viewer/2022060100/60afae08e6dee16a986092b6/html5/thumbnails/20.jpg)
Nov. 7-11, 2003NBI2003 20T.Kobayashi (KEK)
Recent eventsRecent events•• Mar. 6, 2003: Mar. 6, 2003: Informal topical “technical review” on combined function
(CF) magnetConclusion: Go ahead w/ CF scheme
•• MarMar.,., 20032003: 2nd J-PARC International Advisory CommitteeShould start neutrino as soon as possible
•• Mar. 22,2003Mar. 22,2003: J-PARC Nuclear & Particle Facility committeeHigh priority on neutrino
Technical review on neutrino beam line recommended•• May 2003May 2003 International collaboration for experiment formed
(Spokesperson: K.Nishikawa)•• Jun. 2003Jun. 2003: Budget request submitted to Monka-sho (MEXT)
5 year plan•• Aug.2003Aug.2003: The request went out to MOF•• Oct.2003Oct.2003: CSTP (council for science & technology policy) cabinet
office (Chair: prime minister) rated J-PARCν at lowest rank
•• Nov.7,2003Nov.7,2003: 1st review committee meeting to re-evaluate J-PARC project….
•• Nov.12,13,2003Nov.12,13,2003: J-PARC ν technical advisory committee•• End of Dec.:End of Dec.: Final answer of approval comes from MOF
![Page 21: Status of J-PARC facility (introduction) · 2003. 12. 3. · T.Kobayashi (KEK) NBI2003 Nov. 7-11, 2003 16 HK SK 3° 2° 3° 2° DV center) 3° 2° 0.02° 1.51° 0.784° Decay pipe](https://reader033.vdocuments.us/reader033/viewer/2022060100/60afae08e6dee16a986092b6/html5/thumbnails/21.jpg)
Nov. 7-11, 2003NBI2003 21T.Kobayashi (KEK)
SummarySummary
• J-PARC ν facility features;– High intensity & peak power radiation/shock– Superconducting combined function magnets– Off-axis beam
• Design & R&D work intensively going– (as you will hear)
• Aiming to start experimentat the beginning of 2009at the beginning of 2009
– (of course, aiming to be approved before that…)