The Belle II SVD data readout system

Thalmeier, R.; Adamczyk, K.; Aihara, Hiroyuki; Angelini, C.; Aziz, T.; Babu, V.; Bacher, S.; Bahinipati, S.; Barberio, E.; Baroncelli, Ti.; Basith, Abdul; Batignani, G.; Bauer, Anton J.; Behera, P. K.; Bergauer, T.; Bettarini, S.; Bilka, T.; Bosi, F.; Bosisio, L.; Bożek, A.; Buchsteiner, F.; Bulla, Lukas; Casarosa, G.; Ceccanti, M.; Červenkov, D.; Chendvankar, S. R.; Dash, N.; Divekar, S. T.; Doležal, Z.; Dutta, D.; Forti, F.; Friedl, M.; Hara, K.; Higuchi, T.; Horiguchi, T.; Irmler, C.; Ishikawa, A.; Jeon, H. B.; Joo, C.; Kandra, J.; Kang, K. H.; Kato, E.; Kawasaki, T.; Kodyš, P.; Kohriki, T.; Koike, S. T.; Kolwalkar, M. M.; Kvasnička, P.; Lanceri, L.; Lettenbicher, J.; Maki, M.; Mammini, P.; Mayekar, S. N.; Mohanty, G. B.; Mohanty, S.; Morii, T.; Nakamura, K. R.; Natkaniec, Z.; Negishi, K.; Nisar, N. K.; Onuki, Y.; Ostrowicz, W.; Paladino, A.; Paoloni, E.; Park, H.; Pilo, F.; Profeti, A.; Rao, K. K.; Rashevskaya, I.; Rizzo, G.; Różańska, M.; Sasaki, J.; Sato, N.; Schultschik, S.; Schwanda, C.; Seino, Y.; Shimizu, Nobuhiro; Stypula, J.; Suzuki, Jun–ichi; Tanaka, S.; Tanida, K.; Taylor, G. N.; Thomas, R.; Tsuboyama, T.; Uozumi, S.; Urquijo, P.; Vitale, L.; Watanuki, S.; Watson, I. J.; Webb, J.; Williams, S.; Würkner, B.; Yamamoto, H.; Yin, H.; Yoshinobu, T.

doi:10.1016/j.nima.2016.05.104

Cited by 13 publications

(7 citation statements)

References 1 publication

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“…Each side of the DSSDs features 512 AC-coupled strips with a pitch of 100 µm on the n-side (x-coordinate) and 50 µm on the p-side (y-coordinate). The strips on each side are connected to 4 APV25 [9] chips (Figure 2) which are then read out by a VME-based flash ADC (FADC) system [8], initially developed for Belle II [10]. In order to increase the maximum data acquisition (DAQ) rate of the tracker, the old VME-based data transfer from the FADC boards to the PC was replaced by a Gigabit Ethernet (GbE) readout system, increasing the DAQ rate from 500 Hz to 30 kHz.…”

Section: Trackermentioning

confidence: 99%

A Proton Computed Tomography Demonstrator for Stopping Power Measurements

Ulrich-Pur¹,

Bergauer²,

Burker³

et al. 2021

Preprint

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Particle therapy is an established method to treat deep-seated tumours using accelerator-produced ion beams. For treatment planning, the precise knowledge of the relative stopping power (RSP) within the patient is vital. Conversion errors from x-ray computed tomography (CT) measurements to RSP introduce uncertainties in the applied dose distribution. Using a proton computed tomography (pCT) system to measure the SP directly could potentially increase the accuracy of treatment planning. A pCT demonstrator, consisting of double-sided silicon strip detectors (DSSD) as tracker and plastic scintillator slabs coupled to silicon photomultipliers (SiPM) as a range telescope, was developed. After a significant hardware upgrade of the range telescope, a 3D tomogram of an aluminium stair phantom was recorded at the MedAustron facility in Wiener Neustadt, Austria. In total, 80 projections with 6.5 × 10 5 primary events were acquired and used for the reconstruction of the RSP distribution in the phantom. After applying a straight-line approximation for the particle path inside the phantom, the most probable value (MPV) of the RSP distribution could be measured with an accuracy of 0.59 %. The RSP resolution inside the phantom was only 9.3 % due to a limited amount of projections and measured events per projection.

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Section: Trackermentioning

confidence: 99%

A Proton Computed Tomography Demonstrator for Stopping Power Measurements

Ulrich-Pur¹,

Bergauer²,

Burker³

et al. 2021

Preprint

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“…The readout of the SiC strip sensor was utilized using an APV25 readout ASIC connected to the sensor on a hybrid board (see figure 3) [15]. The APV25 is read out by a FADC system which was originally developed for the Belle-II project [16]. The APV25 provides 128 channels for strip sensor readout and includes a preamplifier, pulse shaper and integrating circuit.…”

Section: Strip Sensor Readout With Apv25 Asicmentioning

confidence: 99%

4H-Silicon Carbide as particle detector for high-intensity ion beams

Christanell,

Tomaschek,

Bergauer

2021

Preprint

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A: In ion cancer therapy, high-intensity ion beams are used to treat tumors by taking advantage of the Bragg-Peak. Typical ion therapy centers use particle rates up to 10 10 ions/second for treatment. On the other hand, such intensities are often too high when using these beamlines for particle physics experiments or as a test-beam environment in general. The project presented here aims to develop a beam position and intensity monitor, to cover a wide intensity range from a few Hz up to GHz rates, as used in clinical settings.Silicon carbide (SiC) is an attractive detector material for this application because it combines potential high radiation hardness with high thermal conductivity to avoid cooling. Moreover, its high electron saturation velocity allows very fast signals to mitigate pile-ups. However, some special properties of the material like different crystal polytypes have to be considered.In this paper, measurements on both a pad and a micro-strip SiC sensor prototype of 4H lattice geometry are shown. The sensors were tested in the laboratory using radioactive sources and with a proton beam in a wide intensity range (kHz-GHz) and with different energies (60-800 MeV) available at MedAustron, an ion cancer therapy center located in Austria.The measurements show that MIP particles cannot be detected reliably with the used discrete electronics setup in combination with the single-channel sensor. However, the strip sensor combined with an ASIC-based readout electronics from the CMS/Belle-II experiments allows to recover a certain part of the signal. This makes it possible to determine the ionization energy and average number of electron/hole pairs generated in the studied sensor samples.

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“…The sensor itself is readout via 4 APV25 chips [13] on each side (128 strips/APV, Figure 4a). A custom readout system [2], which was originally developed for the Belle II Silicon Vertex Detector [14], was used. The readout was triggered using the RaMon plastic scintillators, which were placed behind the DSSD.…”

Section: Spot Size Measurementmentioning

confidence: 99%

Commissioning of low particle flux for proton beams at MedAustron

Ulrich-Pur,

Adler,

Bergauer

et al. 2021

Preprint

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MedAustron is a synchrotron based particle therapy centre located in Wiener Neustadt, Austria. It features three irradiation rooms for particle therapy, where proton beams with energies up to 252.7 MeV and carbon ions of up to 402.8 MeV/u are available for cancer treatment. In addition to the treatment rooms, MedAustron features a unique beam line exclusively for non-clinical research (NCR). This research beam line is also commissioned for proton energies up to 800 MeV, while available carbon ion energies correspond to the ones available in the treatment rooms. All irradiation rooms offer particle rates in the order of 10 9 particles/s for protons and 10 7 particles/s for carbon ions. Such high fluxes are needed to efficiently irradiate patients in a short amount of time. However, for research purposes also lower particle fluxes are required. Therefore lower proton flux settings for the NCR beamline were commissioned. Three particle flux settings ranging from ≈ 2.4 kHz to ≈ 5.2 MHz were established for seven proton energies below 252.7 MeV. In addition to the particle rate, the spot sizes and beam energies were measured for these settings. Also three low flux settings for 800 MeV protons ranging from ≈ 2 kHz to ≈ 1.3 MHz were commissioned.

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The Belle II SVD data readout system

Cited by 13 publications

References 1 publication

A Proton Computed Tomography Demonstrator for Stopping Power Measurements

A Proton Computed Tomography Demonstrator for Stopping Power Measurements

4H-Silicon Carbide as particle detector for high-intensity ion beams

Commissioning of low particle flux for proton beams at MedAustron

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