In this paper we report on the timing resolution obtained in a beam test with pions of 180 GeV/c momentum at CERN for the first production of 45 μm thick Ultra-Fast Silicon Detectors (UFSD). UFSD are ...based on the Low- Gain Avalanche Detector (LGAD) design, employing n-on-p silicon sensors with internal charge multiplication due to the presence of a thin, low-resistivity diffusion layer below the junction. The UFSD used in this test had a pad area of 1.7 mm2. The gain was measured to vary between 5 and 70 depending on the sensor bias voltage. The experimental setup included three UFSD and a fast trigger consisting of a quartz bar readout by a SiPM. The timing resolution was determined by doing Gaussian fits to the time-of-flight of the particles between one or more UFSD and the trigger counter. For a single UFSD the resolution was measured to be 34 ps for a bias voltage of 200 V, and 27 ps for a bias voltage of 230 V. For the combination of 3 UFSD the timing resolution was 20 ps for a bias voltage of 200 V, and 16 ps for a bias voltage of 230 V.
Design optimization of ultra-fast silicon detectors Cartiglia, N.; Arcidiacono, R.; Baselga, M. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
10/2015, Letnik:
796
Journal Article
Recenzirano
Odprti dostop
Low-Gain Avalanche Diodes (LGAD) are silicon detectors with output signals that are about a factor of 10 larger than those of traditional sensors. In this paper we analyze how the design of LGAD can ...be optimized to exploit their increased output signal to reach optimum timing performances. Our simulations show that these sensors, the so-called Ultra-Fast Silicon Detectors (UFSD), will be able to reach a time resolution factor of 10 better than that of traditional silicon sensors.
Signal formation in irradiated silicon detectors Baldassarri, B.; Cartiglia, N.; Cenna, F. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
02/2017, Letnik:
845, Številka:
C
Journal Article
Recenzirano
Odprti dostop
In this paper we present an initial study on the effects induced by radiation on the signal generated by a minimum ionising particle in silicon detector. The results are obtained by implementing in ...the simulation programme Weightfield2 (WF2) charge carrier trapping and non linear distribution of the electric field. Results of sample simulations are presented, along with a discussion of the limitations of the current approach and ideas for future improvements.
•The effects of charge trapping and quadratic electric field have been implemented in Weightfield2.•Simulation results show drastic trapping reduction in thin sensors and suggest survival of timing efficiency in LGADs.•Changes in mobility and charge multiplication effects have yet to be addressed.
Ultra-fast silicon detectors (UFSD) Sadrozinski, H.F.-W.; Anker, A.; Chen, J. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
09/2016, Letnik:
831, Številka:
C
Journal Article
Recenzirano
Odprti dostop
We report on measurements on Ultra-Fast Silicon Detectors (UFSD) which are based on Low-Gain Avalanche Detectors (LGAD). They are n-on-p sensors with internal charge multiplication due to the ...presence of a thin, low-resistivity diffusion layer below the junction, obtained with a highly doped implant. We have performed several beam tests with LGAD of different gain and report the measured timing resolution, comparing it with laser injection and simulations. For the 300μm thick LGAD, the timing resolution measured at test beams is 120ps while it is 57ps for IR laser, in agreement with simulations using Weightfield2. For the development of thin sensors and their readout electronics, we focused on the understanding of the pulse shapes and point out the pivotal role the sensor capacitance plays.
Signal formation in irradiated silicon detectors Baldassarri, B.; Cartiglia, N.; Cenna, F. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
06/2016, Letnik:
845
Journal Article
Recenzirano
Odprti dostop
In this paper we present an initial study on the effects induced by radiation on the signal generated by a minimum ionising particle in silicon detector. The results are obtained by implementing in ...the simulation programme Weightfield2 (WF2) charge carrier trapping and non linear distribution of the electric field. Results of sample simulations are presented, along with a discussion of the limitations of the current approach and ideas for future improvements.
Tracking in 4 dimensions Cartiglia, N.; Arcidiacono, R.; Baldassarri, B. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
02/2017, Letnik:
845, Številka:
C
Journal Article
Recenzirano
Odprti dostop
In this contribution we will review the progresses toward the construction of a tracking system able to measure the passage of charged particles with a combined precision of ∼10ps and ∼10μm, either ...using a single type of sensor, able to concurrently measure position and time, or a combination of position and time sensors.
PDF
