Strip detectors with an area of
16
cm
2
were processed on high resistivity n-type magnetic Czochralski silicon. In addition, detectors were processed on high resistivity Float Zone wafers with the ...same mask set for comparison. The detectors were irradiated to several different fluences up to the fluence of
3
×
10
15
1
MeV
n
eq
/
cm
2
with protons or with mixed protons and neutrons. The detectors were fully characterized with CV- and IV-measurements prior to and after the irradiation. The beam test was carried out at the CERN H2 beam line using a silicon beam telescope that determines the tracks of the incoming particles and hence provides a reference measurement for the detector characterization. The n-type MCz-Si strip detectors have an acceptable
S/N at least up to the fluence of
1
×
10
15
n
eq
/
cm
2
and thus, they are a feasible option for the strip detector layers in the SLHC tracking systems.
Pad and strip detectors processed on high resistivity n-type magnetic Czochralski silicon (MCz-Si) were irradiated to several different fluences with protons. The pad detectors were characterized ...with the transient current technique (TCT) and the full-size strip detectors with a reference beam telescope and a 225
GeV muon beam. The TCT measurements indicate a double junction structure and space charge sign inversion in MCz-Si detectors after
6
×
10
14
1
MeV
n
eq
/
cm
2
fluence. In the beam test a signal-to-noise (
S/
N) ratio of 50 was measured for a non-irradiated MCz-Si sensor, and a
S/
N ratio of 20 for the sensors irradiated to the fluences of
1
×
10
14
1 and
5
×
10
14
1
MeV
n
eq
/
cm
2
.
Finnish CMS-TOB cosmic rack Mäenpää, T.; Hæggström, E.; Anttila, E. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
2007, Letnik:
570, Številka:
2
Journal Article
Recenzirano
Odprti dostop
We present a cosmic rack, the FinnCRack. This device is a silicon strip detector-based telescope that measures tracks of cosmic particles. The FinnCRack is constructed using components of the Tracker ...Outer Barrel (TOB) of the CMS experiment at the CERN LHC. The device is part of the TOB integration and verification effort together with its sister telescope, the CERN CRack. Both CRacks mimick a six degree slice of the TOB barrel structure. The FinnCRack is intended to (a) serve as a platform for TOB software development, both analysis and online software such as run control; (b) be used for noise and cluster shape studies; (c) act as a reference tracker in detector studies; and (d) provide a testbed for track-based alignment testing and development. The construction and setup of the FinnCRack have been documented in detail—the entire chain from connecting cables to physics data analysis—and the operation guide was tested in practice. Both these actions serve the purpose of training and attracting future HEP students. We also showed that we were able to measure cosmic muon tracks.
We report on test beam results obtained with a 32.5
cm
2 microstrip detector processed on an n-type 380
μm thick magnetic Czochralski (MCZ) grown silicon substrate with 1200
Ωcm effective ...resistivity. The full depletion voltage of the as-processed detector was 420
V with a leakage current of 2
μA. The AC coupled detector had 1024 p
+ strips, 10
μm by width and 6.154
cm by length with a pitch of 50
μm. The detector was irradiated with 10
MeV protons to 1.6×10
14
1
MeV neutron equivalent fluence and annealed for 345 days at room temperature. The post-irradiation full depletion voltage of the detector was 225
V. The leakage current at the full depletion measured at −10
°C was 261
μA. The beam tests were carried out at the CERN H
2 area using a Silicon Beam Telescope, which consists of pairs of horizontal and vertical position sensitive silicon detectors. This telescope determines the tracks of incoming particles and hence provides a reference measurement for the detector characterization. In the beam test an average signal to noise ratio of 3 with a spatial resolution of 20
μm and a particle detection efficiency of 36% were measured. These results show that the MCZ device detected particles, which encourages further investigations of MCZ silicon as a detector material. The poor performance of the MCZ detector may be explained by the problems observed in the reference telescope.
Silicon beam telescope for CMS detector tests Eklund, C.; Heikkinen, A.; Honkanen, A. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
1999, Letnik:
430, Številka:
2
Journal Article
Recenzirano
A beam telescope providing precision track measurements as reference for other detectors has been upgraded in the CERN H2 test beam. The apparatus was completely rebuilt from the detector wafers and ...front-end electronics to the data acquisition system. The new detector setup consists of eight
5.6×5.6
cm
2
sized DC coupled silicon microstrip detectors. Typical position resolution values of about
7.5
μm
were measured. Details of the setup are described and results from the recent beam tests are reported.
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