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1
n_TOF
ReportWeek 31-32
12nd – 19th August 2021
On behalf of the n_TOF Collaboration
Javier Praena
Prof. Universidad de Granada (Spain)
CERN Scientific Associate (EP/SME)
n_TOF Physics Coordinator
1
2Javier Praena – U. Granada – CERN (EP/SME)
Summary
• Target performance is excellent. Maximum temperature around 50 degrees.
• Since 2nd August per Super cycle:
• 4 pulses at 8e12ppp
• 1-2 pulses at 2e12ppp.
• We should continue with continuous proton beam checking the target performance.
• At the same time to measure the neutron flux at experimental areas for crossing check with the target.
• This week we needed to stop the beam few times for intervention for one of the detectors at both
experimental areas: PPAC1 and PPAC2.
• For the PPAC at EAR1 the problems have been solved.
• For the PPAC at EAR2 there are few problems concerning the gas system regulation. So we needed to
stop the beam more than expected. This problem has been partly solved, however, today we will need
another intervention of the EAR2, thus, to stop the beam.
• Then, interventions are needed we will try to do it in the afternoon after 17:00.
PS/SPS Meeting, 19/08/2021
20 GeV
PS Protons
3
EAR1: setups for flux measurement.
Javier Praena – U. Granada – CERN (EP/SME)
EAR1
@ 185 m
Simon1
(4 Si detectors
off-beam)
PPAC1
(2x235U, gas
On-beam)
MGAS1 (235U and 2x10B
(Gas Ionization on-beam)
PTB (10x235U,gas
on-beam)
Timepix1.2
(Si detector
On-beam)
C6D6 and
iTED
PS/SPS Meeting, 19/08/2021
20 GeV
PS Protons
EAR2
@ 20 m
4Javier Praena – U. Granada – CERN (EP/SME)
Ne
utr
on
s
Simon2
(4 Si detectors
off-beam)
Ne
utr
on
sN
eu
tro
ns
PPAC1
(238U, 237Np gas,
on-beam)
MGAS1 (235U, 10B,
gas on-beam)
EAR2: setups for flux measurement.
PS/SPS Meeting, 19/08/2021
55
Thank you
Javier Praena
Universidad de Granada (Spain)
CERN Scientific Associate (EP/SME)
n_TOF Physics Coordinator
20 GeV
PS Protons
EAR2 (2014)
@ 20 m
6
Commissioning: monitoring target and flux at EARs
Javier Praena – U. Granada – CERN (EP/SME)
Ne
utr
on
s
EAR1 (2001)
@ 185 m
NEAR (2021)
Protons
R. Esposito, M. Calviani
PS/SPS Meeting, 19/08/2021
20 GeV
PS Protons
7
Target and proton beam
Javier Praena – U. Granada – CERN (EP/SME)
Protons
R. Esposito, M. Calviani
PS/SPS Meeting, 19/08/2021
20 GeV
PS Protons
8
Alignment has been finished: EAR1 final setup until September.
Javier Praena – U. Granada – CERN (EP/SME)
EAR1
@ 185 m
Simon1
(4 Si detectors
off-beam)
PPAC1
(2x235U, gas
On-beam)
MGAS1 (235U and 2x10B
(Gas Ionization on-beam)
PTB (10x235U,gas
on-beam)
Timepix1.2
(Si detector
On-beam)
C6D6 and
iTED
F. Murtas
PS/SPS Meeting, 19/08/2021
20 GeV
PS Protons
EAR2
@ 20 m
9Javier Praena – U. Granada – CERN (EP/SME)
Ne
utr
on
s
Simon2
(4 Si detectors
off-beam)
Ne
utr
on
sN
eu
tro
ns
Alignment has been finished: EAR2 final setup until September.
F. Murtas
PPAC1
(238U, 237Np gas,
on-beam)
MGAS1 (235U, 10B,
gas on-beam)
PS/SPS Meeting, 19/08/2021