The tracker part of the Turkish Accelerator Center super charm factory detector is composed of 10 silicon strip detector planes supported with carbon layers. In this work, FLUKA simulation results of ...momentum, energy and position resolutions are presented for this structure. These simulations show that the silicon tracker design is suited for the requirements given by the charm factory physics program.
A total of 106 maize seed samples were collected from different agro-climatic regions of
India. Sixty-two Fusarium isolates were recovered, 90% of which were identified as Fusarium verticillioides
...based on morphological and molecular characters. Use of the tef-1α gene corrected/refined
the morphological species identifications of 11 isolates, and confirmed those of the remaining isolates. Genetic diversity
among the Fusarium isolates involved multilocus fingerprinting profiles by Inter Simple Sequence Repeats (ISSR) UPGMA
and tef-1α gene phenetic analyses; for which, we observed no significant differences among the isolates based on
geographic origin or fumonisin production; most of the subdivision related to species. Genotyping was performed on the
F. verticillioides isolates, using 12 primer sets from the fumonisin pathway, to elucidate the molecular basis of fumonisin
production or non-production. One fumonisin-negative isolate, UOMMF-16, was unable to amplify nine of the 12 fumonisin
cluster genes tested. We also used the CD-ELISA method to confirm fumonisin production for our 62 Fusarium
isolates. Only 15 isolates were found to be fumonisin-negative. Interestingly, genotypic characterization revealed six isolates
with various gene deletion patterns that also tested positive for the production of fumonisins via CD-ELISA. Our
findings confirm the importance of molecular studies for species delimitation, and for observing genetic and phenotypic
diversity, among the Fusaria.
The silicon tracker part of the Turkish Accelerator Center super charm particle factory detector was designed for effectively tracking charged particles with momentum values up to 2.0GeV/c. In this ...work, the FLUKA simulation code has been used to estimate the track parameters and their resolutions in the designed tracker system. These results have been compared with those obtained by the tkLayout software package. The simulated track parameter resolutions are compatible with the physics goals of the tracking detector.
Scintillation crystal-avalanche photodiode (APD) system is an important radiation detection technique. The lead tungstate (PbWO sub(4)) is one of the scintillation crystal used in high-energy physics ...experiments. The light generated in the PbWO sub(4) crystal could be split into scintillation and Cherenkov components. GEANT4 simulation of the light generated by high-energy particles in the PbWO sub(4) crystal shows that up to 20% of the light generated in the crystals is a result of the Cherenkov mechanism. The mean signals of the APDs were simulated by Single Particle Monte Carlo technique for the incident light produced in the PbWO sub(4) crystal. The results show that the Cherenkov light contribution to the total signal is more than 20% for both the Hamamatsu S8148 and ZnS-Si APD structures placed at end of the crystal.
Silicon Avalanche Photodiodes (APDs) are currently proposed as readout devices for the electromagnetic calorimeters to be used in proposed new detectors. In the present paper the photon detection ...mechanism of APDs is investigated and we discuss possible APD structures that would be suitable for particle physics experiments. Calculations were made with a Single-Particle Monte Carlo simulation technique, written in Fortran. The results agree well with measurements made on commercial APDs. Based on this work, we suggest some changes which improve the performance of APDs as detectors for scintillation light.
Scintillation crystal–avalanche photodiode (APD) system is an important radiation detection technique. The lead tungstate
(
PbWO
4
)
is one of the scintillation crystal used in high-energy physics ...experiments. The light generated in the
PbWO
4
crystal could be split into scintillation and Cherenkov components. GEANT4 simulation of the light generated by high-energy particles in the
PbWO
4
crystal shows that up to 20% of the light generated in the crystals is a result of the Cherenkov mechanism. The mean signals of the APDs were simulated by Single Particle Monte Carlo technique for the incident light produced in the
PbWO
4
crystal. The results show that the Cherenkov light contribution to the total signal is more than 20% for both the Hamamatsu S8148 and ZnS–Si APD structures placed at end of the crystal.
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