j-parc hadron physics programj-parc-th.kek.jp/workshops/2016/3-2/slides/02-05_sawada.pdf · j-parc...
TRANSCRIPT
J-PARC HADRON PHYSICS PROGRAM
March 2, 2016 Shin’ya Sawada 澤田 真也 KEK (High Energy Accelerator Research Organization)
International Workshop on Progress on J-PARC Hadron Physics in 2016, Tokai 1
Contents
• J-PARC and Hadron Experimental Facility (Hadron Hall) • Physics overview and fruits so far obtained • High-momentum beam line • Extension • Summary
2
3 J-PARC Facility
(KEK/JAEA)
Bird’s eye photo in January of 2016
South to North
Experimental Areas
Neutrino Beams (to Kamioka)
JFY2009 Beams
Hadron Exp. Facility
Materials and Life Experimental Facility
JFY2008 Beams
3 GeV Synchrotron
JFY2007 Beams
Linac
Hadron Experimental Facility (Current Layout)
Hadron Hall
50GeV Synchrotron
Beam Dump
50GeV Tunnel
T1 Target (30/50% Loss)
Test BL
Hi-P BL
Extension SM1
(2% Loss) T0
0.1% Loss)
Switchyard
4
5
K1.8
KL
SKS
K1.8BR
Beam Lines
Experiment Secondary particles Max. Mom. Max. Intensity
K1.8 Hypernuclei, Hadron Physics with S
p, K, p (2 separators) < 2.0 GeV/c ~105 Hz for K+
K1.8BR Hadron Physics with S p, K, p (1 separator) < 1.0 GeV/c ~104 Hz for K+
K1.1BR Lepton Flavor violation p, K, p (1 separator) < 1.1 GeV/c ~104 Hz for K+
KL Neutral K rare decay Neural Kaon ~ 2 GeV/c ~106 Hz
Intense Kaon Beam in the momentum range of ̃ 1 GeV/c
Jan.2009
Oct.2009
Oct.2009
K1.1(plan)
Hadron Experimental Facility (HEF)
Contents
• J-PARC and Hadron Experimental Facility (Hadron Hall) • Physics overview and fruits so far obtained • High-momentum beam line • Extension • Summary
6
? Superconductivity
“Gas”
?
r
T
QGP
Compression by gravity
0
Hadron Baryon Meson
“Liquid (Liquid drop)”
Origin and evolution of (quark)matter in Universe
(Phase diagram)
Normal nuclei High-density mtter
Stars Neutron starts
重力圧縮 P.T. Quark stars*
quark matter
Cooling by
Phase transition
Nucleosynthesis
→ Fluid
Big Bang
s quark
Strangeness Physics (J-PARC)
Hadron Physics (J-PARC)
H, He→ Fe
Supernova Fe→ U
hadronization hadron mass, confinement
High-density nuclear matter Generalized nuclear force
Nuclear/Hadron Physics at HEF • Modern picture of nuclear force based on QCD
• Hypernuclear spectroscopy → YN/YY int. ⇔ lattice-QCD • g-ray spectroscopy(E13), double-strangeness system(E03/E05/E07/E42)
• YN scattering (E40) • Hadrons in vacuum and medium
• Exotic hadrons (E19) • In-medium property of hadrons
→ Chiral Symmetry Breaking (CSB) • meson-mass spectroscopy (E16)
• LNN three-body force • Phase diagram and Equation Of State (EOS) of quark (hadron)
matter • low-T high-r region - Strangeness physics
• n-rich L-nuclei (E10), multi-strangeness, KbarN interaction (E15/E17/E27/E31) • Hadronization phase - Hadron physics
• exotic hadrons (E19) , charmed baryon spectroscopy (E50)
Blue: performed or on-go Red: plan
L n
n p
L
n p
p
4LH 4
LHe
Results (1)
• E19:Search for Q+ by p-+p→K-X • No peak was observed - U.L. of cross section : 0.28mb/sr - U.L. of Q+ width: 0.36 (1.9) MeV for ½ + (½-)
• E10:Neutron-rich 6LH via the 6Li(p-,K+) • No peak was observed - U.L. of cross section :1.2nb/sr ⇔ Observation of 3 candidates by FINUDA ( PRL 108,04251(2012) )
2010, Jan.2012
Dec.2012-Jan.201
PRL 109, 132002(2012) PRC 90, 035205(2014)
PLB 729, 39 (2014)
Results (2)
Analysis of inclusive spectrum was also published. PTEP 2014, 101D03(2014)
p SN-LN cusp p Shift of Y* bump
Missing mass spectrum is obtained with two protons tag Observation of “K-pp”-like structure PTEP 2015, 021D01 (2015)
Binding Energy 95 (stat.) (syst.) MeV Width 162 (stat.) (syst.) MeV
+18 -17
+30 -21
+87 -45
+66 -78
10
L(1405)+p K-+p+p
Missing mass spectrum
Experimental Method • E27: Search for K-pp bound states by
the d(p+,K+) at Pp=1.7GeV/c
Jun. 2012
A positive signature of K-pp bound state was obtained. Comparison with other experiments and theoretical studies are necessary and important to establish K-
pp bound state.
Results (3) • E15: Search for K-pp bound
states by the 3He(K-,n)X→Lp
1st- stage RUN with 1% of the proposal
May 2013
“semi”-inclusive ~10MeV/c2 resolution
Contribution of S→np (No other contribution in a bound-region due to kinematical limitations)
Significant enhancements were observed in a bound-region
arXiv:1408.5637 [nucl-ex]
12
Hadron Beam Operation in 2015 2015 Renovation Test operation User operation
13
Jan. 6 7 8
Apr.
8 9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Restart of Hadron Beam Operation Renovation
Test operation
The first beam extraction to the Hadron hall (3kW) The first beam injection to the target
12kW test operation started.
24kW test operation started. Facility inspection for the license as a radiation facility
The certificate was issued.
• The whole system, including newly installed equipment, was checked during the test operation period.
• In each step of the beam power improvements, new target system, monitoring system, etc. were confirmed to work properly.
14
Jan. 6 7 8
Apr.
8 9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Restart of Hadron Beam Operation
User operation restarted with the proton beam power of 24kW!
(Almost 2 years after the accident)
Development of Beam Intensity
41.6 kW
15
5.52s cycle 6s cycle
0500100015002000250030003500
0
10
20
30
40
50
2009/1/1 2010/1/1 2011/1/1 2012/1/1 2013/1/1 2014/1/1 2015/1/1
Accu
mul
ated
po
wer
(kW
*day
s)
Ave.
pow
er (k
W) Ave. power (kW)
Accumulated power (kW*days)
0
500
1000
1500
2000
2500
3000
3500
05
1015202530354045
2015/4/1 2015/6/1 2015/8/1 2015/10/1 2015/12/1
Accu
mul
ated
pow
er
(kW
*day
s)
Ave.
pow
er (k
W)
Ave. power (kW)Accumulated power (kW*days)
Accumulated beam time and intensity for HD Before accident (Feb, 2009 – May, 2013): 1.26x106 spills※, 560 kW*days After accident (Apr, 2015 – Dec, 2015): 1.05x106 spills, 2338 kW*days
24 kW @resumption
※spill: # of beam shots to HD
Beam time used by experiments in 2015 16
この数字は割当時間なので、 実際に使った時間に直す
ホールの絵
E14 KL->π0νν Experiment 1509 hours E36 Measurement of Γ(K+->e+ν)/Γ(K+->μ+ν) 1504 hours
E15 search for deeply-bound kaonic nuclear states 708 hours
E05 Spectroscopic Study of Ξ-Hypernucleus 319 hours
E07 Systematic Study of Double Strangeness System with an Emulsion-Counter Hybrid Method
42 hours
E13 γ-ray spectroscopy of light hypernuclei 435 hours
K1.8
KL
K1.8BR
K1.1BR
Press-released from Tohoku U., KEK, JAEA, J-PARC
Production Target
50 kW target
• April, 2015 - • Indirect cooling • Currently working
80 kW target
• Fall, 2017 or 2018 - • Indirect cooling • Ready to manufacture
>100 kW target
• Around 2020/2021 - • Direct cooling • Under R&D
18
Current Production Target
Measured temperature was in good agreement with calculation
Temperature of each gold piece was measured with thermocouples every 100ms
6 1.
5
f0.5mm sheath thermocouples
Copper
Beam
1 2 3 4 5 6
050
100150200250300350
0 10 20 30 40 50
Max
. tem
p. ri
se (K
)
Beam power (kW)
datacalc
19
Gold (6-divided)
Proton beam
Cooling water
Stainless-steel pipes
66mm
Copper
Temperature @41.6kW
on spill (2sec) off spill (3.52sec)
max 297℃(ΔT=267K)
beam-power dependence
Production Target
50 kW target
• April, 2015 - • Indirect cooling • Currently working
80 kW target
• Fall, 2017 or 2018 - • Indirect cooling • Ready to manufacture
>100 kW target
• Around 2020/2021 - • Direct cooling • Under R&D
20
Next Indirect Cooling Target • Gold target on Cu holder • Indirect water cooling as the current target • Relatively straightforward to develop. • ~80 kW proton beam can be accepted. • Will be installed as a replacement of the current target.
6
View from upstream
Design margin: 2.5
ANSYS 15.0 NODAL SOLUTIONSTEP=58 SUB =4 TIME=106.88 TEMP (AVG) RSYS=0PowerGraphicsEFACET=1AVRES=MatSMN =60.572 SMX =325.275
1
MN
MXX
Y
Z
60.572 77.116 93.6599 110.204 126.748 143.292 159.836 176.38 192.923 209.467 226.011 242.555 259.099 275.643 292.187 308.731 325.275
target160105-115p(Au ƒÐ2.5,1.0) @ 30GeV-9.19e13ppp @5.52s-cycle (cal+0.15,-0.15)
ANSYS 15.0 NODAL SOLUTIONSTEP=4 SUB =10 TIME=2 SEQV (AVG) RSYS=0DMX =.129E-03 SMN =216621 SMX =.616E+08
1
MN
MX
X
Y
Z
216621 .405E+07 .788E+07 .117E+08 .156E+08 .194E+08 .232E+08 .271E+08 .309E+08 .347E+08 .386E+08 .424E+08 .462E+08 .501E+08 .539E+08 .577E+08 .616E+08
sold-target160105-115p (91.9T,ƒÐ2.5,1.0) @ 30GeV-8.04e13ppp @5.52s-cycle +0.15,-
beam beam
max 325°C
vertical expansion: max 0.10mm
bonded interface 51MPa
bonded interface 229°C
von Mises stress temperature
Bonding strength: 128MPa(@229°C)
Result of Thermal Analysis (80kW, 5.52s cycle)
21
Ready to manufacture
50 kW target
• April, 2015 - • Indirect cooling • Currently working
80 kW target
• Fall, 2017 or 2018 - • Indirect cooling • Ready to manufacture
>100 kW target
• Around 2020/2021 - • Direct cooling • Under R&D
Production Target
22
Rotating “EURO Coin” Target
Beam
Au or Pt
Ni
Contents
• J-PARC and Hadron Experimental Facility (Hadron Hall) • Physics overview and fruits so far obtained • High-momentum beam line • Extension • Summary
23
New Primary Proton Beam Line 24
COMET
High-p Separation
n High-momentum Beam Line – Primary protons (~1010 – 1012pps)
• E16 (phi meson) is considered to be the first experiment.
– Unseparated secondary particles (pi, …) • High-resolution secondary beam by
adding several quadrupole and sextupole magnets.
n COMET – Search for m to e conversion – 8 GeV, 50 kW protons – Branch from the high-momentum BL – Annex building is being built at the
south side.
• New primary Proton Beam Line = High-momentum BL + COMET BL = has been funded and the construction started.
Thin production target!
Secondary beams
Unseparated Secondary Beam 26
1.0E+031.0E+041.0E+051.0E+061.0E+071.0E+081.0E+09
0 5 10 15 20
Cou
nts/
sec
[GeV/c]
1.0E+031.0E+041.0E+051.0E+061.0E+071.0E+081.0E+09
0 5 10 15 20
Cou
nts/
sec
[GeV/c]
Prod. Angle = 0 deg. (Neg.) Prod. Angle = 3.1 deg (Pos.)
p-
K-
pbar
p+
K+
* Sanford-Wang:15 kW Loss on Pt, Acceptance :1.5 msr%, 133.2 m
Noumi
“GPD” and “Transition GPD”
27
, Kp
,p n , , ,N D L S
*g
J-PARC E50 Spectrometer + MuID
28
p-
LH2-target
Ring Image Cherenkov Counter
Internal DC
FM magnet
ps-
K+
Fiber tracker
Beam GC
Internal TOF
Internal TOF DC
TOF wall
2m
Decay p(p+)
20 GeV/c Beam p-
Acceptance: ~ 60% for D*, ~80% for decay p+ Resolution: Dp/p~0.2% at ~5 GeV/c (Rigidity: ~2.1 Tm)
|q|<60_
Scintillator Muon trigger device
m+
m-
Contents
• J-PARC and Hadron Experimental Facility (Hadron Hall) • Physics overview and fruits so far obtained • High-momentum beam line • Extension • Summary
29
Hadron Hall Extension • Extend the Hadron Hall for ~105m. • Construct 2 production targets with beam lines.
30
Single strangeness experiments to explore generalized baryon-baryon interaction
Spectroscopy of multi-strangeness and charm systems
From discovery to measurement of K0 rare decay
Hadron Hall Extension • Hadron Hall extension has been proposed to the Science
Council of Japan for their recommendation as a next big project, and selected as one of the 27 important big projects.
• A review committee at MEXT selected the J-PARC future project including the Hadron Hall extension as one of the 11 major projects on its roadmap.
• The Institute of Particle and Nuclear Studies, KEK has made the discussion for future projects (ILC, neutrino, and Hadron extension) at the research program committee, and they have concluded that the Hadron extension should be promoted, as well as other projects.
31
• The beam operation at the Hadron Facility restarted from April, 2015. • The beam power at the restart was 24kW, and then improved gradually
to 42kW in December. • The high-momentum beam line is under construction, and will be
available in a few years. • The extension of the Hadron Hall has been proposed, and got a good
message from initial reviews.
32
Summary
April 28, 2015