The Time-Of-Flight (TOF) detector of the ALICE experiment at the CERN LHC is based on Multi-gap Resistive Plate Chambers (MRPCs) technology. During the 2009-2013 data taking the TOF system had very ...stable operations with a total time resolution of 80ps. Details of the different calibration procedures and performance with data from collisions at the LHC will be described.
The ratio of energy stored in the magnet to the mass of the structure required to withstand the electromagnetic load is known to be one of the most important characteristics of a system used as a ...superconducting magnetic energy storage (SMES).The concept of quasi-force-free winding, when applied to the design of the SMES magnet system, shows the way to increase the energy to mass ratio and allows to develop new SMES systems with technical and economical parameters better than the existing ones. This paper presents some progress in development of the concept for the SMES with stored energy up to 10 GJ and describes the steps of scaling the "large SMES project" towards a representative model for lab testing. The lab model has been manufactured and tested. The results of the magnetic measurements performed on the lab model confirm the correctness of the main theoretical assumptions which the concept is based upon and, in some way, a possibility to produce the SMES with a high energy-to-mass ratio.
Radiation hard ceramic RPC development Akindinov, A; Dreyer, J; Fan, X ...
Journal of physics. Conference series,
01/2017, Letnik:
798, Številka:
1
Journal Article
Recenzirano
Odprti dostop
We report recent advances in R&D on the Beam Fragmentation and T0 Counter (BFTC) for the CBM experiment, based on RPCs with floating electrodes made of resistive ceramic material. An optimal value of ...the ceramics bulk resistivity has been determined to be about 5·109 ·cm. RPCs with such electrodes show even characteristics and stable operation under particle fluxes of up to 150 kHz/cm2, with the detection efficiency above 90%.
The Time-Of-Flight (TOF) detector of the ALICE experiment at the CERN LHC is based on Multi-gap Resistive Plate Chambers (MRPCs) capable to achieve a time resolution better than 50
ps. The TOF ...detector consists of about 153
000 readout channels covering a total area of about
150
m
2
. In this paper the results of the commissioning of the full TOF are reported, including the first calibration results obtained with cosmic rays.
The Time-Of-Flight detector (TOF) of the ALICE experiment at the CERN LHC is based on Multi-gap Resistive Plate Chambers (MRPCs). The TOF detector consists of 152928 readout channels covering a total ...area of 141 m
2
. In this paper the results of the calibration with cosmic-ray data collected during 2009 are presented.
Final test of the MRPC production for the ALICE TOF detector Akindinov, A.; Alici, A.; Antonioli, P. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
05/2009, Letnik:
602, Številka:
3
Journal Article
Recenzirano
Odprti dostop
During the autumn of 2006 a final test of a sample of double-stack MRPC (Multigap Resistive Plate Chamber) strips, randomly chosen from two years of mass production (the ALICE Time-Of-Flight detector ...is made of 1638 strips), was carried out at the CERN Proton Synchrotron facility. The results on the performances of the MRPCs and of the front-end and readout electronics will be presented. It is confirmed that these devices have a very good uniformity of response, a long streamer-free plateau, an efficiency higher than 99% and an “intrinsic” time resolution better than about 40
ps.
A Cosmic Ray Test Facility (CRTF) is the first large-scale implementation of a scintillation triggering system based on a new technique, scintillation tile with MRS APD light readout (START). In ...START, the scintillation light is collected and transported by WLS optical fibers, while light detection is performed by pairs of avalanche photodiodes with the Metal–Resistor–Semiconductor structure (MRS APD) operated in the Geiger mode. START delivers 100% efficiency of cosmic muon detection, while its intrinsic noise level is less than
10
-
2
Hz
. CRTF, consisting of 160 START channels, has been continuously operated by the ALICE TOF collaboration for more than 25
000
h, and has demonstrated a high level of stability. Fewer than 10% of MRS APDs had to be replaced during this period.
Scintillation counter with MRS APD light readout Akindinov, A.; Bondarenko, G.; Golovin, V. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
02/2005, Letnik:
539, Številka:
1
Journal Article
Recenzirano
Odprti dostop
START, a high-efficiency and low-noise scintillation detector for ionizing particles, was developed for the purpose of creating a high-granular system for triggering cosmic muons. Scintillation light ...in START is detected by MRS APDs (Avalanche Photo-Diodes with Metal-Resistance-Semiconductor Structure), operated in the Geiger mode, which have
1
mm
2
sensitive areas. START is assembled from a
15
×
15
×
1
cm
3
scintillating plastic plate, two MRS APDs and two pieces of wavelength-shifting optical fiber stacked in circular coils inside the plastic. The front-end electronic card is mounted directly on the detector. Tests with START have confirmed its operational consistency, over 99% efficiency of MIP registration and good homogeneity. START demonstrates a low intrinsic noise of about
10
-
2
Hz
. If these detectors are to be mass-produced, the cost of a mosaic array of STARTs is estimated at a moderate level of
2
–
3
kUSD
/
m
2
.
PDF
