Pixel Multichip Module Development at Fermilab for the PHENIX Experiment

Turqueti, Marcos; Andresen, Jeff; Brooks, M. L.; Butsyk, S.; Cardoso, Guilherme; Christian, David; Kapustinsky, J.; Kunde, G. J.; Kwan, S.; Lee, D. M.; Rivera, R.

doi:10.1109/nssmic.2006.356205

Cited by 4 publications

(3 citation statements)

References 6 publications

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“…6). This would be a small, thin superconducting solenoid enclosing scintillating-fiber tracking detectors and silicon vertex detectors (e.g., of the type developed for BTe V [83]). The cost of superconducting magnets is monitored by LBNL's M. Green and reported in periodic papers at the Applied Superconductivity Workshops [85].…”

Section: Apparatusmentioning

confidence: 99%

Medium-Energy Antiproton Physics with the Antiproton Annihilation Spectrometer (TApAS*) at Fermilab

Bartoszek¹,

Piacentino

Phillips

et al. 2008

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Fermilab has long had the world's most intense antiproton source. Despite this, the opportunities for medium-energy antiproton physics at Fermilab have been limited in the past and -with the antiproton source now exclusively dedicated to serving the needs of the Tevatron Collider -are currently nonexistent. The anticipated shutdown of the Tevatron in 2010 presents the opportunity for a world-leading medium-energy antiproton program. We summarize the current status of the Fermilab antiproton fa cility and review some physics topics for which the experiment we propose could make the world's best measurements. Among these, the ones with the clearest potential for high impact and visibility are in the area of charm mixing and CP violation.Continued running of the Antiproton Source following the shutdown of the Tevatron is thus one of the simplest ways that Fermilab can restore a degree of breadth to its future research program. The impact on the rest of the program will be minor. \Ve request a small amount of effort over the coming months in order to assess these issues in more detail.•Spokesperson.

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Section: Apparatusmentioning

confidence: 99%

Medium-Energy Antiproton Physics with the Antiproton Annihilation Spectrometer (TApAS*) at Fermilab

Bartoszek¹,

Piacentino

Phillips

et al. 2008

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“…These constraints, together with the added requirement of low mass, make the HDI a necessity. The HDI is a flex circuit with 50 µm copper traces, 50 µm center-to-center pitch, and 150 µm via pads [4]. Up to eight readout chips can be installed on a single HDI flex circuit.…”

Section: A Hardwarementioning

confidence: 99%

The Test Stand System for the PHENIX iFVTX Silicon Detector

Rivera

Turqueti

2007

2007 15th IEEE-NPSS Real-Time Conference

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-PHENIX is the largest of the four experiments currently taking data at the Relativistic Heavy Ion Collider (RHIC), and the iFVTX is a new pixel tracker which will be installed in the forward tracker region of PHENIX. Fermilab has developed a complete test stand system for the examination of FPix2.1 modules, hybrids, and pixel chips that will be installed in the iFVTX. The system is currently in use for chip, module, and wafer testing at Fermilab. The test stand architecture is flexible and can be adapted to new requirements. In this paper, the software and hardware integration will be discussed followed by an analysis of the advantages of choosing a modular approach for the system. Finally, a selection of tests supported by the system, along with sample results, will be presented and explained.

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“…The achievement of this ideal case is highly probable for "commercial" HPCD, on which optimal operating parameters has already been studied at their early-stage development [2]. In opposite case, during the prototyping phase of HPCD, where the number of chips may vary [5][6][7], and for which different dedicated printed-circuit boards might be designed, it is highly probable to get different electrical properties from one prototype to another. This can imply some variations on optimal operating parameters, and in turn may imply counting biases if some noise baselines are not correctly localized within pixels trimmer range (figures 3(a)-(d)).…”

Section: Introductionmentioning

confidence: 99%

Pragmatic method for fast programming of hybrid photon counting detectors

Bacchi¹,

Dawiec²,

Orsini³

2022

J. Inst.

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It is now been over 15 years since Hybrid Photon Counting Detectors (HPCD) became one of the standard position-sensitive detectors for synchrotron light sources and X-ray detection applications. This is mainly due to their single-photon sensitivity over a high dynamic energy range and electronic noise suppression thanks to energy thresholding. To reach those performances, all HPCD pixels must feature the same electrical response against photons of the same energy. From the analysis of a monochromatic beam, in case of an ideal HPCD detector, it would be sufficient to apply a fixed voltage threshold among all pixels, positioned at half of the mean pulse amplitude to count every photon above the threshold. However, in practical cases, it must be considered that noise baselines from all pixels are not always strictly located at the same voltage level but can be spread over some voltage ranges. To address this kind of issue, most of all HPCDs apply a conventional threshold equalization method, that mainly relies on three steps; the setting of a global threshold at an arbitrary value, the identification of pixels noise baseline around that global threshold through an in-pixel threshold trimmer, and the computation of the required threshold offsets for setting all pixels at their own noise baseline at the same time. However, in case of a first-time use of an HPCD prototype, the threshold equalization might be biased by parameters that are wrongly set. Those biases can sometimes be characterized by the inability to localize some pixel noise baselines, which could be outside the voltage range of the threshold trimmer. The recovery of those biased pixels could be performed by changing the position of the global threshold, or by increasing the voltage range of the threshold trimmer. Unfortunately, both solutions could be time consuming due to the lack of information on the required steps for recovering all noise baselines. In order to overcome this issue in a reasonable time, this work introduces a pragmatic method that can be applied to HPCDs for an early and effective identification of appropriate pixels’ parameters, avoiding the need to test a high number of pixels configurations. The application of this method, at the early stage of the HPCD calibration, may drastically reduce the investigation time for finding the optimal operating parameters of HPCD prototypes.

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Pixel Multichip Module Development at Fermilab for the PHENIX Experiment

Cited by 4 publications

References 6 publications

Medium-Energy Antiproton Physics with the Antiproton Annihilation Spectrometer (TApAS*) at Fermilab

Medium-Energy Antiproton Physics with the Antiproton Annihilation Spectrometer (TApAS*) at Fermilab

The Test Stand System for the PHENIX iFVTX Silicon Detector

Pragmatic method for fast programming of hybrid photon counting detectors

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