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TRANSCRIPT
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1
JSNS2
KEK
Jungsic Park,
[email protected], [email protected]
2020 ( 2 ) 11 19
1
2013 JSNS2 J-PARC Sterile Neutrino Search
at J-PARC Spallation Neutron Source J-PARC
PAC [1] , , ,
[2] 5
,
,
[3]
, 2020 6 10
,
, ,
1.1
,
, LSND LSND
,
30
[4] LSND
,
,
LSND ,
3.8σ ,
, ,
JSNS2
, , LSND
,
,
, J-PARC (MLF)
800 ns 100 ns
(25 Hz) duty factor
GdLS
, LSND
1 , LSND
1.2
5 JSNS2
, [5]
,
MiniBooNE
,
[6]
,
110
-
2
1: LSND JSNS2
JSNS2 LSND
17 tons 167 tons
24 meters 30 meters
3 GeV 0.8 GeV
duty Factor 0.8/40000 (Synchrotron) 1/14 (Linac)
µ−/µ+ 1.7×10−3 6.5×10−4
Gd-loaded non Gd-loaded ( )
Etot: 8 MeV, ∆T: ∼30 µs Etot:2.2 MeV, ∆T: ∼ 200 µs2.4% @ 45 MeV 7% @ 45 MeV
, 10 m
([7, 8, 9] ), Neutrino-4
[10] ,
[11, 12]
Planck ,
[13]
, LSND MiniBooNE
,
, LSND , 20
, JSNS2
LSND
,
2020 6 7
Neutrino 2020
[14] ,
,
1.3
2015 JSNS2
[2]
, 2016 , S
, [15]
,
RENO [16]
(LS)30 [17]
, , 120
70% 30%
[18]
LED
,
, ,
, Daya-Bay 2019
17
JSNS2
,
2
1 MLF
GeV
,
, , K ,
JSNS2 , MLF3 24 m
50 120
,
24 m
, K
111
-
3
1: MLF
, 2 236 MeV
,
50 ,
2
, , ,
2011 , Daya-Bay
[19], RENO [16], Double-Chooz [20]
3.2 m, 2.5 m
,
(Gd) (GdLS) 17
,
ν̄e+p → e++n ,,
,
30 µs Gd 8 MeV
,
,
4.6 m, 4 m
,
120 10 ,
, Gd
, 2
,
,
2:
, ,
, L
Gd γ
,
,
L 96
, Gd γ
, 24
,
, MLF
3 ,
, 7 10
,
MLF ,
3 , , 6
60,000 L
ISO-tank ,
,
, 11
112
-
4
,
, ,
,
, ,
,
,
,
,
,
, PAC J-PARC
, PAC (FIFC)
, J-PARC , MLF
, 2017
4 , 2018 3 , 2019 2
,
J-PARC ,
2020
3
, [3]
, ,
, ,
, ,
,
3.1
[15]
J-PARC
, JSNS2 Gd
Gd γ ,
,
,
3D
, ,
,
4
3D
3D
JSNS2
2020 1
2 ,
,
,
3.2
,
GdLS 17 ,
Gd γ
Gd LS 30 GdLS
2017 Daya-Bay , 2019 8
, , JSNS2
Daya-Bay GdLS
LS , 2017
, RENO
[17] ,
RENO GdLS, LS
2018 9 11 ,
RENO ,
ISO-tank
GdLS LS , ISO-tank
GdLS1 , LS2 ,
, GdLS ,
ISO-tank
, [21] ,
GdLS
, ISO-tank
,
3.3
,
GdLS, LS
113
-
5
3: JSNS2 6 , MLF1
, , ,
ISO-tank
11 , , 24 m
4:
,
,
,
15 cm ,
,
1 m 6 m
0.3 m 1.2 m 2
,
,
, [22]
3.4
MLF3 , 1
18 , 6 30
,
,
, ,
, ,
∆V/V ∼ 9×10−4/ , GdLS 17, 17 L/
42 cm ,
12 cm/ , ,
15 cm
, 1
MLF 1
10 ,
JSNS2
8
, , 1/2
, 1/2
,
,
5 ,
2.5 m2 , 1
0.7 cm/
24 cm ,
,
±17 ,, 8 φ 90
114
-
6
5:
, 2
,
, 2
3.5 ,
JSNS2
, [22] ,
, ,
, , ,
,
National Instrument (NI) cDAQ-9178 [23]
, ,
NI DAQ NI LabVIEW
[24]
LabVIEW
MySQL[25]
LabVIEW ,
Grafana[26]
MySQL
Grafana
, , Grafana e-mail
LINE
HV CAEN SY1527LC [27] , CAEN
OPC LabVIEW
HV ,
LabVIEW ,
HV HV
Grafana
3.6
,
[28] , 1
,
,
, 14
bit , 500 MHz
ADC
, Double-Chooz
, ADC
ADC 8 bit
,
2
ADC , 14 bit
,
,
Double-Chooz ADC
,
,
,
,
120 VME 2 ,
4 , PC ,
PC
PC ,
,
115
-
7
6: J-PARC , 6.6 m
2 ,
8
, ,
NIM
, 14 bit 500 MHz ,
ADC
4 JSNS2
4.1
,
2020 1
5 , MLF1
2020 2 6 ,
ISO-tank3 MLF1
, ,
3 ( 7),
, ,
,
2020 5 6 1.5
,
,
7: MLF3
,
8: ISO-tank
,
4.2
2 GdLS, LS
100 L/ 2
,
LS
ISO-tank 3 MLF , 1
(PVDF/PFA ) 36 L/
8
LabVIEW
MySQL Grafana
2
1 ,
Grafana
116
-
8
,
GdLS ,
10 cm GdLS
GdLS
, LS 4
1
,
10 ,
,
GdLS
,
GdLS ISO-tank
GdLS ISO-tank
, GdLS
LS
, 44 L/ ,
9
1st data taking (6/5 – 6/15) (Stable (Gd)LS operation)
9:
GdLS
0.55 m ,
,
, PAC ,
,
4.3
, 6 5
MLF3 , 24 m
7 ,
,
, 10
, 3
,
,
500 ns
,
,
, MLF
MLF
, 10 25 µs
,
10 µs
,
100 µs
2 ,
10 ,
9×1020 POT (= proton on target), J-PARC PAC
, 0.8%
,
24 ,
,
LED252Cf
,
,
117
-
9
06/05 09
:00
06/06 09
:00
06/07 09
:00
06/08 09
:00
06/09 09
:00
06/10 09
:00
06/11 09
:00
06/12 09
:00
06/13 09
:00
06/14 09
:00
06/15 09
:00
time
0
1
2
3
4
5
6
7
8
9
]20
Inte
grat
ed P
OT [x
10Integrated POTIntegrated POT
10: POT
5
,
,
,
,
, Gd γ
Gd
,
Gd γ 8MeV
, Gd
11 ,252Cf
,
,
,
,
, ,
,
12
0 500 1000 1500 2000 2500 3000 Total Charge /p.e.
3−10
2−10
1−10 Rat
e /kH
z/bin
glegle
11: 252Cf
96
,
, Gd
8 MeV γ
,
,
0 ns ,
MLF 2
,
,
, K+
Kaon
Decay-At-Rest (K DAR)
K DAR
µ ,
100 MeV
µ
2.2 µs ,
Michel , ∼53 MeV
,
13 ,
(0 1 µs)
2 µs K DAR
, 50 MeV,
118
-
10
2:
/
+ 8
40 ms 0.5
LED , 252Cf , 0.5
0.5
, 0.5
2000− 1000− 0 1000 2000 3000 4000 5000 6000 7000 8000 Timing /ns
310
410
510
To
tal C
har
ge
/p.e
.
1
10
210
12:
, 0 2000 ns J-PARC
2
20 MeV ,
µ
30 /
10%
,
6
,
,
,
1.5 ,
,
, ,
J-PARC
, ,
, ,
13: K DAR ( )
( ) :
2
2 µs :
,
,
,
,
, 10
,
,
,
,
J-PARC MLF 2020 11
,
,
,
119
-
11
, ,
,
, J-PARC PAC MW
×15000 , 14 ,
, LSND
14: JSNS2 MW
15000 [3] LSND
90% ,
99%
,
, 2020 8 ,
,
,
,
,
, NA61 [29]
, 14
∆m2 LSND JSNS2
LSND
7
J-PARC,
, ,
,
, ,
,
, ,
,
Double-Chooz
,
RENO , 17 GdLS
Daya-Bay ,
16H06344,16H03967,20H05624 J-PARC
, J-PARC
,
[1] M. Harada, et al ., arXiv:1310.1437
[2] , , , ,
(vol.34 No.1) (2015)
[3] S. Ajimura, et al ., arXiv:1705.08629
[4] A. Aguilar, et al ., Phys. Rev. D 64, 112007
(2001).
[5] M. Dentler, et al ., JHEP 08 010 (2018),
arXiv:1803.10661 (2018)
[6] A.A. Aguilar-Arevalo et al ., (MiniBooNE Col-
laboration) Phys. Rev. Lett. 121, 221801 (2018)
[7] Y. J. Ko, et al ., Phys. Rev. Lett. 118 (2017) 12,
121802
[8] J. Ashenfelter, et al ., Phys. Rev. Lett. 122 (2019)
25, 251801
[9] H. Almazán, et al ., Phys. Rev. Lett. 121 (2018)
16, 161801
[10] A. P. Serebrov, et al ., arXiv:1809.10561 (2018)
[11] P. Adamson, et al ., Phys. Rev. Lett. 122 (2019)
9, 091803
[12] K. Abe, et al ., Phys. Rev. D 99 (2019) 7, 071103
[13] See Knox, Lloyd’s presentation in Neutrino
2020 for example. https://indico.fnal.gov/
event/43209/timetable/ (June-24)
[14] See JSNS2 presentation in Neutrino 2020.
https://indico.fnal.gov/event/43209/
timetable/ (July-2)
120
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12
[15] Y. Hino, et al., JINST 14 (2019) no.09, T09001
[16] J. K. Ahn, et al ., Phys. Rev. Lett. 108 (2012)
191802
[17] J. S. Park et al., JINST 15 (2019) no.09, T09010
[18] J. S. Park et al., JINST 15 (2020) no.07, T07003
[19] F. P. An, et al ., Phys. Rev. Lett. 108 (2012)
171803
[20] Y. Abe, et al ., Phys. Rev. Lett. 108 (2012)
131801
[21] Y. Hino et al., JINST 14 (2019) no.09, P09007
[22] J. S. Park et al., arXiv:2005.01286
[23] https://www.ni.com/ja-jp/support/model.
cdaq-9178.html
[24] https://www.ni.com/ja-jp/shop/labview.
html
[25] https://www.mysql.com/jp/
[26] https://grafana.com/
[27] http://www.caen-group.com/jsp/Template2/
CaenProd.jsp?idmod=491$\&$parent=20
[28] J. S. Park et al., JINST 15 (2020) no.09, T09002
[29] https://cds.cern.ch/record/2309890?ln=en
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