Planar sensors for future Vertex and Tracking Detectors

Dierlamm, A.

doi:10.22323/1.198.0027

Cited by 8 publications

(10 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A comprehensive program has been carried out to identify suitable silicon materials [3]. Measurements on the charge collection of 300 µm thick silicon confirmed earlier studies [4] that strip sensors with collection of holes for signal generation have greater degradation than sensors with collection of electrons for signal generation (Fig.8).…”

Section: Radiation Tolerant Sensorssupporting

confidence: 62%

“…Measurements on the charge collection of 300 µm thick silicon confirmed earlier studies [4] that strip sensors with collection of holes for signal generation have greater degradation than sensors with collection of electrons for signal generation (Fig.8). In addition, irradiated sensors with n-type bulk have shown non-Gaussian noise, resulting in an irreducible rate of fake hits [3]. This phenomenon, also called Random Ghost Hits (RGH), was also observed on p-type sensors with a too high p-stop concentration [5].…”

Section: Radiation Tolerant Sensorsmentioning

confidence: 98%

See 1 more Smart Citation

Silicon sensor prototypes for the Phase II upgrade of the CMS tracker

Bergauer

2016

Nuclear Instruments and Methods in Physics Research Section A:

View full text Add to dashboard Cite

The CMS Tracker will be completely exchanged in the so called Phase-II upgrade. To preserve and enhance its performance in the High-Luminosity LHC phase, the new tracker will need to cope with very high radiation levels, track densities and pile-ups. In addition, it needs to provide input for the level-1 trigger. In this paper we present the baseline design of the new tracker, with a special emphasis on the two detector module concepts for the outer tracker, the 2S and PS module. The CMS Tracker collaboration designed and procured sensor prototypes from several vendors. These productions are intended for evaluating the production quality of the manufacturers, for providing functional sensors for module prototypes and for concluding the survey towards a suitable silicon base material and sensor design. Here we provide first results of the PS-p macro-pixel-light sensor and of full-scale strip sensor prototypes for the 2S module concept, both on 6-and 8-inch wafers. AbstractThe CMS Tracker will be completely exchanged in the so called Phase-II upgrade. To preserve and enhance its performance in the High-Luminosity LHC phase, the new tracker will need to cope with very high radiation levels, track densities and pile-ups. In addition, it needs to provide input for the level-1 trigger.In this paper we present the baseline design of the new tracker, with a special emphasis on the two detector module concepts for the outer tracker, the 2S and PS module. The CMS Tracker collaboration designed and procured sensor prototypes from several vendors. These productions are intended for evaluating the production quality of the manufacturers, for providing functional sensors for module prototypes and for concluding the survey towards a suitable silicon base material and sensor design. Here we provide first results of the macro-pixel-light sensor for the PS module and of full-scale strip sensor prototypes for the 2S module concept, both on 6-and 8-inch wafers.

show abstract

Section: Radiation Tolerant Sensorssupporting

confidence: 62%

Section: Radiation Tolerant Sensorsmentioning

confidence: 98%

Silicon sensor prototypes for the Phase II upgrade of the CMS tracker

Bergauer

2016

Nuclear Instruments and Methods in Physics Research Section A:

View full text Add to dashboard Cite

show abstract

“…The CMS tracker will be replaced completely. The new tracker will be equipped with n-in-p type sensors as several R&D studies showed an enhanced radiation hardness of this sensor type [1,2,3]. The expected fluence in CMS of the inner layers (R∼20 cm) equipped with silicon strip sensors is about F = 1 × 10 15 n eq cm −2 .…”

Section: Lhc and Cms Upgradementioning

confidence: 99%

“…Signal measurements have been performed with the ALiBaVa 3 System based on the analogue Beetle chip used in the LHCb experiment. Penetrating electrons from the β − decay of a Sr 90 3 source have been triggered by a scintillator and measurements have been performed before and after mixed irradiation up to F = 1.5 × 10 15 n eq cm −2 (R = 20 cm). From the batch of samples#3, where two different p-stop distances (16 µm and 25 µm) have been produced, no difference in charge collection in dependence on the p-stop distance to n+ strips has been observed.…”

Section: Defectmentioning

confidence: 99%

T-CAD analysis of electric fields in n-in-p silicon strip detectors in dependence on the p-stop pattern and doping concentration

Printz¹

2015

J. Inst.

View full text Add to dashboard Cite

Detectors based on silicon have been proven to be efficient for particle tracking in high energy physics collider experiments. The Compact Muon Solenoid (CMS) Tracker at CERN in Geneva has a silicon detector surface of about 200 m 2 . The increasing demand on more collected data for new physics studies requires an upgrade of the Large Hadron Collider to higher luminosity which is foreseen for 2023. The increase of particles per time and area also introduces a harsh environment for the silicon sensors which should withstand an integrated luminosity of about L = 3000 fb −1 . Several R&D studies have been undertaken to face the high luminosity challenge and n-in-p detectors have been found to be more radiation hard than p-in-n. However, n-in-p detectors necessarily need an isolation layer of the n+ strips due to an accumulation layer of electrons caused by positive charge in the SiO 2 at the sensor surface. An additional implantation of acceptors like boron between the n+ strips cuts the conducting electron layer and ensures reliabe strip isolation. Though the implantation dose as well as the implant energy have to be carefully calculated as they directly affect the breakdown behavior and inter-strip resolution of the sensors. Experimentally, the inter-strip resistance and charge collection efficiency as well as the cluster charge formation are a direct indicator whether the isolation layer is sufficient or not. Furthermore T-CAD simulation studies have been carried out in order to reproduce the measure-ments and to predict the performance of sensors before and after irradiation with protons, neutrons and a mixture of both. Simulations also allow detailed studies of the formation of electric fields in the sensor which predict the sensor performance. Experimentally obtained CCE and misidentified hits in n-in-p devices with p-stop isolation pattern can be explained after analysis of the electric fields in dependence on the pstop geometry and doping concentrations. The comparison of data and simulation results offers the possibility to limit the parameters of the pstop isolation technique which significantly affects the performance of irradiated n-in-p type silicon sensors.Presented at PSD10 10th International Conference on Position Sensitive Detectors ABSTRACT: Detectors based on silicon have been proven to be efficient for particle tracking in high energy physics collider experiments. The Compact Muon Solenoid (CMS) Tracker at CERN near Geneva has a silicon detector surface of about 200 m 2 . The increasing demand on more collected data for new physics studies requires an upgrade of the Large Hadron Collider to higher luminosity which is foreseen for 2023. The increase of particles per time and area also introduces a harsh environment for the silicon sensors which should withstand an integrated luminosity of about L = 3000 fb −1 . Several R&D studies have been undertaken to face the high luminosity challenge and n-in-p detectors have been found to be more radiation hard than p-in-n. However, n-in-p detectors...

show abstract

“…Surface resistivity and p-stop concentration, pstop width and geometry adjust the current. 200 µm thickness of the active volume was selected and n-in-p technology was chosen as a result of previous studies [5]. …”

Section: Ps Module For the Cms Phase 2 Upgradementioning

confidence: 99%

Status of sensor qualification for the PS module with on-chip pT discrimination for the CMS tracker phase 2 upgrade

Großmann

2017

Nuclear Instruments and Methods in Physics Research Section A:

View full text Add to dashboard Cite

The high luminosity upgrade of the LHC is targeted to deliver 3000 fb −1 at a luminosity of 5 × 10 34 cm −2 s −1 . Higher granularity, 140 collisions per bunch crossing and existing bandwidth limitations require a reduction of the amount of data at module level. New modules have binary readout, on-chip p T discrimination and capabilities to provide track finding data at 40 MHz to the L1-trigger. The CMS collaboration has undertaken R&D effort to develop new planar sensors for the pixel-strip (PS) module, which has to withstand 1 × 10 15 cm −2 1 MeV neutron equivalent fluence in the innermost layer of the tracker. The module is composed of a strip sensor and a macro pixel sensor with 100 µm x 1.5 mm pixel size. Sensors were characterized in the laboratory and the effects of different process parameters and sensor concepts were studied. This contribution presents a new sensor prototype with n-pixels in p-bulk material in planar technology for the PS module. A new inverted module concept is presented, which has advantages with respect to the baseline concept. Electrical characterization of sensors and SEM-images are presented. AbstractThe high luminosity upgrade of the LHC is targeted to deliver 3000 fb −1 at a luminosity of 5 × 10 34 cm −2 s −1 . Higher granularity, 140 collisions per bunch crossing and existing bandwidth limitations require a reduction of the amount of data at module level. New modules have binary readout, on-chip p T discrimination and capabilities to provide track finding data at 40 MHz to the L1-trigger. The CMS collaboration has undertaken R&D effort to develop new planar sensors for the pixel-strip (PS) module, which has to withstand 1 × 10 15 cm −2 1 MeV neutron equivalent fluence in the innermost layer of the tracker. The module is composed of a strip sensor and a macro pixel sensor with 100 µm x 1.5 mm pixel size. Sensors were characterized in the laboratory and the effects of different process parameters and sensor concepts were studied. This contribution presents a new sensor prototype with n-pixels in p-bulk material in planar technology for the PS module. A new inverted module concept is presented, which has advantages with respect to the baseline concept. Electrical characterization of sensors and SEM-images are presented.

show abstract

Planar sensors for future Vertex and Tracking Detectors

Cited by 8 publications

References 18 publications

Silicon sensor prototypes for the Phase II upgrade of the CMS tracker

Silicon sensor prototypes for the Phase II upgrade of the CMS tracker

T-CAD analysis of electric fields in n-in-p silicon strip detectors in dependence on the p-stop pattern and doping concentration

Status of sensor qualification for the PS module with on-chip pT discrimination for the CMS tracker phase 2 upgrade

Contact Info

Product

Resources

About