PID system based on focusing aerogel RICH for the super C-τ factory Barnyakov, A.Yu; Barnyakov, M.Yu; Boborovnikov, V.S. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
02/2020, Letnik:
952
Journal Article
Recenzirano
A high performance particle identification (PID) system is essential for the successful realization of the broad physics program at the future Super C-τ Factory in Novosibirsk. The main requirements ...for the PID system are as follows: good π/K-separation in the entire operational momentum range and good μ∕π-separation in the momentum range from 0.3 to 1.2 GeV/c. The RICH detector based on focusing aerogel radiator (FARICH) and position-sensitive photon detector meets all these requirements. The FARICH method is described, and the beam test results are presented. The FARICH system design outline for the Super C-τ Factory project is presented. Most promising photon detector options are considered.
The Super Charm–Tau (SCT) Factory is a proposed electron–positron collider in Novosibirsk with a peak luminosity of 1035cm−1s−1 operating in the energy range between 2and 6 GeV. The interaction ...region should be equipped by an excellent universal particle detector meeting the requirements of broad physics program of the experiment. Research and development for all detector subsystems is currently underway. Particle identification (PID) system of the detector is required to provide the state-of-the-art level of μ/π separation for the particle momenta up to 1.2GeV∕c. The following options for the PID system are considered in this paper: focusing aerogel ring imaging Cherenkov (FARICH) detector composed of 4-layer aerogel tiles, threshold Cherenkov counters based on aerogel shifter photomultiplier (ASHIPH), and time-of-flight (ToF) detector combined with the time-of-propagation (ToP) approach providing a time resolution better than 30ps. Assessment of the charged particle separation performance for these options based on simulation and prototype tests results is presented.
Operation and performance of the ASHIPH counters at the KEDR detector Barnyakov, A.Yu; Barnyakov, M.Yu; Boborovnikov, V.S. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
07/2016, Letnik:
824
Journal Article
Recenzirano
In 2014 the fully installed ASHIPH (Aerogel, SHifter, PHotomultiplier) system began its operation in the KEDR experiment at the VEPP-4M e+e−-collider. The system contains 1000liters of aerogel with ...refractive index n=1.05 in 160 counters that are arranged in two layers. Cherenkov light collection is preformed by means of wavelength shifters (WLS). 160Micro-Channel Plate (MCP) PMTs with multialkali photocathode are used as photodetectors. Efficiency of relativistic particles detection was measured with e+e−→e+e− events and cosmic muons. Detection efficiency for under-threshold particles was measured with cosmic muons. From these data π/K-separation of 4σ at the momentum 1.2GeV/c was obtained.
Development of aerogel Cherenkov detectors at Novosibirsk Barnyakov, A.Yu; Barnyakov, M.Yu; Bähr, J. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
11/2005, Letnik:
553, Številka:
1
Journal Article
Recenzirano
Odprti dostop
The development of aerogel Cherenkov counters with the light collection using a wavelength shifter is described. 80 counters of this type are working in the KEDR detector. A project of similar ...counters for the SND detector based on “heavy” aerogel with
n
=
1.13
has been developed. Aerogel with a refractive index of 1.006–1.13 and dimensions of blocks up to
200
×
200
×
50
mm
3
is produced by the Novosibirsk group for use in Cherenkov counters of different types. The Novosibirsk group is participating in the development of LHCb RICH as well as a beam diagnostics for a photo-injector test facility at DESY–Zeuthen. Recently we started development of RICH based on focusing aerogel (FARICH) for the endcap of the SuperBaBar. For the first time in the world the focusing aerogel with layers of different refractive indices has been produced.
The status of the KEDR ASHIPH system Barnyakov, A.Yu; Barnyakov, M.Yu; Bobrovnikov, V.S. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
02/2004, Letnik:
518, Številka:
1
Journal Article
Recenzirano
Cherenkov counters based on Aerogel, wavelength SHIfter, and PHotomultipliers (ASHIPH) for the KEDR detector are described. As compared with the direct light collection on PMT, the ASHIPH method ...allows us to diminish the number of PMTs essentially. The quality of the particle identification with the ASHIPH counters was tested. The π/K separation is 4.5
σ for the momentum
1.2
GeV/c
. The mass production of the ASHIPH counters was organized in Budker Institute of Nuclear Physics (Novosibirsk, Russia). 80 counters filled with
500
ls
of aerogel have been produced and tested with cosmic muons. These counters were installed into the KEDR detector in 2003. The stability of the micro-channel PMTs without protecting layer was studied. The first results on a long-term stability of the ASHIPH counters filled with the hygroscopic aerogel are presented.
The work on aerogel Cherenkov counters was started in Novosibirsk in 1986. Production of aerogels with refractive indices of 1.006–1.13 and thicknesses of blocks up to 50
mm was developed. The light ...absorption length at 400
nm is 5–7
m, the scattering length is 4–5
cm. By these parameters, the Novosibirsk aerogel is one of the best in the world. The ASHIPH Cherenkov counters with light collection on wavelength shifters have been developed. The ASHIPH system of the KEDR detector contains 1000
l of aerogel. The
π
/
K
separation is
4.5
σ
. A project of ASHIPH counters for the SND detector has been developed. Aerogel RICH for LHCb gives a possibility to identify hadrons in the momentum range of 2–10
GeV/
c. The Novosibirsk group is developing an aerogel RICH for the endcap for the SuperBaBar project. Calculations performed by a group of physicists from Novosibirsk and DESY-Zeuthen have shown that aerogel radiators enable to achieve time resolution up to 20
fs.
The 2.5 D code Arsenal-MSU is based on fully relativistic self-consistent algorithms for numerical simulation of beam-wave interaction in all parts of the klystron from cathode to collector. This ...code has been used to calculated C-band and L-band MBK designed and manufactured by IECAS. The problems met on both physical modules and calculation methods is presented. Some modifications made on code are also described in this paper. The calculation results and comparison with 1D code and experiment are given out.
Relativistic high power klystrons Sandalov, A. N.; Pikunov, V. M.; Rodiakin, V. E. ...
1992 9th International Conference on High-Power Particle Beams
3
Conference Proceeding
The design and the first testing of relativistic klystrons amplifier (RKA) with the efficiency of 40-50% for realization on intense electron beams with beam energy 400 keV are presented. Theoretical ...investigations of RKA have been made by 1D, 1.5D and 2.5D PIO codes. The self-field structure of relativistic electron bunch is numerically studies from these codes.
