Fri·Oct 30, 2020Friday·October 30, 2020

1. 01*

   Masses of short-lived ${}^{49}Sc$, ${}^{50}Sc$, ${}^{70}As$, ${}^{73}Br$ and stable ${}^{196}Hg$ nuclides

   I. Kulikov🇩🇪 · A. Algora🇪🇸 · D. Atanasov🇩🇪 · P. Ascher🇫🇷 · K. Blaum🇩🇪 · R.B. Cakirli🇹🇷 · A. Herlert🇩🇪 · W. J. Huang🇩🇪 · J. Karthein🇨🇭 · Yu. A. Litvinov🇩🇪 · D. Lunney🇫🇷 · V. Manea🇨🇭 and 4 other authors

   Mass measurements of ${}^{49,50}$Sc, ${}^{70}$As, ${}^{73}$Br and ${}^{196}$Hg nuclides produced at CERN's radioactive-ion beam facility ISOLDE are presented. The measurements were performed at the ISOLTRAP mass spectrometer by use of the multi-reflection time-of-flight and the Penning-trap mass spectrometry techniques. The new results agree well with previously known literature values. The mass accuracy for all cases has been improved.

   nucl-exNPA(2020)·1 citation
2. 02*

   Signature of a possible $\alpha$-cluster state in $N=Z$ doubly-magic ${}^{56}$Ni

   S. Bagchi🇳🇱 · H. Akimune🇯🇵 · J. Gibelin🇫🇷 · M. N. Harakeh🇳🇱 · N. Kalantar-Nayestanaki🇳🇱 · N. L. Achouri🇫🇷 · B. Bastin🇫🇷 · K. Boretzky🇩🇪 · H. Bouzomita🇫🇷 · M. Caamaño🇪🇸 · L. Càceres🇫🇷 · S. Damoy🇫🇷 and 27 other authors

   An inelastic $\alpha$-scattering experiment on the unstable $N=Z$, doubly-magic ${}^{56}$Ni nucleus was performed in inverse kinematics at an incident energy of 50 A.MeV at GANIL. High multiplicity for $\alpha$-particle emission was observed within the limited phase-space of the experimental setup. This observation cannot be explained by means of the statistical-decay model. The ideal classical gas model at $kT$ = 0.4 MeV reproduces fairly well the experimental momentum distribution and the observed multiplicity of $\alpha$ particles corresponds to an excitation energy around 96 MeV. The method of distributed $m\alpha$-decay ensembles is in agreement with the experimental results if we assume that the $\alpha$-gas state in ${}^{56}$Ni exists at around $113_{-17}^{+15}$ MeV. These results suggest that there may exist an exotic state consisting of many $\alpha$ particles at the excitation energy of $113_{-17}^{+15}$ MeV.

   nucl-exEPJA(2020)·2 citations
3. 03*

   White Rabbit Time Synchronization for Radiation Detector Readout Electronics

   Wolfgang Hennig · Shawn Hoover

   As radiation detector arrays in nuclear physics applications become larger and physically more separated, the time synchronization and trigger distribution between many channels of detector readout electronics become more challenging. Clocks and triggers are traditionally distributed through dedicated cabling, but newer methods such as the IEEE 1588 Precision Time Protocol and White Rabbit allow clock synchronization through the exchange of timing messages over Ethernet. Consequently, we report here the use of White Rabbit in a new detector readout module, the Pixie-Net XL. The White Rabbit core, data capture from multiple digitizing channels, and subsequent pulse processing for pulse height and constant fraction timing are implemented in a Kintex 7 FPGA. The detector data records include White Rabbit time stamps and are transmitted to storage through the White Rabbit core's gigabit Ethernet data path or a slower diagnostic/control link using an embedded Zynq processor. The performance is characterized by time-of-flight style measurements and by time correlation of high energy background events from cosmic showers in detectors separated by longer distances. Software for the Zynq processor can implement "software triggering", for example to limit recording of data to events where a minimum number of channels from multiple modules detect radiation at the same time.

   ↳ physics.ins-detnucl-exIEEE Trans.Nucl.Sci.(2021)·1 citation
4. 04*

   FERS-5200: a distributed Front-End Readout System for multidetector arrays

   Massimo Venaruzzo · Andrea Abba · Carlo Tintori · Yuri Venturini

   The FERS-5200 is the new CAEN Front-End Readout System for large detector arrays. It consists in a compact, distributed and easy-deployable solution integrating front-end based on ASICs, A/D conversion, data processing, synchronization and readout. Using the appropriate Front-End the solution perfectly fits a wide range of detectors such as SiPMs, multianode PMTs, GEMs, Silicon Strip detectors, Wire Chambers, Gas Tubes, etc. The first member of the FERS family is the unit A5202, a 64 channel readout card for SiPMs, based on the CITIROC ASIC by Weeroc SaS. The Concentrator board DT5215 can manage the readout of up to 128 cards at once, that is 8192 readout channels in case of the A5202.

   ↳ physics.ins-detnucl-ex3 citations
5. 05*

   Axionlike particles searches in reactor experiments

   D. Aristizabal Sierra🇨🇱 · V. De Romeri🇪🇸 · L. J. Flores🇲🇽 · D.K. Papoulias🇬🇷

   Reactor neutrino experiments provide a rich environment for the study of axionlike particles (ALPs). Using the intense photon flux produced in the nuclear reactor core, these experiments have the potential to probe ALPs with masses below 10 MeV. We explore the feasibility of these searches by considering ALPs produced through Primakoff and Compton-like processes as well as nuclear transitions. These particles can subsequently interact with the material of a nearby detector via inverse Primakoff and inverse Compton-like scatterings, via axio-electric absorption, or they can decay into photon or electron-positron pairs. We demonstrate that reactor-based neutrino experiments have a high potential to test ALP-photon couplings and masses, currently probed only by cosmological and astrophysical observations, thus providing complementary laboratory-based searches. We furthermore show how reactor facilities will be able to test previously unexplored regions in the $\sim$MeV ALP mass range and ALP-electron couplings of the order of $g_{aee}\sim 10^{-8}$ as well as ALP-nucleon couplings of the order of $g_{ann}^{(1)}\sim 10^{-9}$, testing regions beyond TEXONO and Borexino limits.

   ↳ hep-phhep-exnucl-exJHEP(2021)·57 citations
6. 06*

   The GosipGUI framework for control and benchmarking of readout electronics front-ends

   Joern Adamczewski-Musch · Nikolaus Kurz🇩🇪

   The GOSIP (Gigabit Optical Serial Interface Protocol) provides communication via optical fibres between multiple kinds of front-end electronics and the KINPEX PCIe receiver board located in the readout host PC. In recent years a stack of device driver software has been developed to utilize this hardware for several scenarios of data acquisition. On top of this driver foundation, several graphical user interfaces (GUIs) have been created. These GUIs are based on the Qt graphics libraries and are designed in a modular way: All common functionalities, like generic I/O with the front-ends, handling of configuration files, and window settings, are treated by a framework class GosipGUI. In the Qt workspace of such GosipGUI frame, specific sub classes may implement additional windows dedicated to operate different GOSIP front-end modules. These readout modules developed by GSI Experiment Electronics department are for instance FEBEX sampling ADCs, TAMEX FPGA-TDCs, or POLAND QFWs. For each kind of front-end the GUIs allow to monitor specific register contents, to set up the working configuration, and to interactively change parameters like sampling thresholds during data acquisition. The latter is extremely useful when qualifying and tuning the front-ends in the electronics lab or detector cave. Moreover, some of these GosipGUI implementations have been equipped with features for mostly automatic testing of ASICs in a prototype mass production. This has been applied for the APFEL-ASIC component of the PANDA experiment currently under construction, and for the FAIR beam diagnostic readout system POLAND.

   ↳ physics.ins-detnucl-exIEEE Trans.Nucl.Sci.(2021)·0 citations
7. 07*

   The FragmentatiOn Of Target Experiment (FOOT) and its DAQ system

   Silvia Biondi · Andrey Alexandrov · Behcet Alpat · Giovanni Ambrosi🇮🇹 · Stefano Argirò · Rau Arteche Diaz · Nazarm Bartosik · Giuseppe Battistoni · Nicola Belcari · Elettra Bellinzona · Maria Giuseppina Bisogni · Graziano Bruni and 83 other authors

   The FragmentatiOn Of Target (FOOT) experiment aims to provide precise nuclear cross-section measurements for two different fields: hadrontherapy and radio-protection in space. The main reason is the important role the nuclear fragmentation process plays in both fields, where the health risks caused by radiation are very similar and mainly attributable to the fragmentation process. The FOOT experiment has been developed in such a way that the experimental setup is easily movable and fits the space limitations of the experimental and treatment rooms available in hadrontherapy treatment centers, where most of the data takings are carried out. The Trigger and Data Acquisition system needs to follow the same criteria and it should work in different laboratories and in different conditions. It has been designed to acquire the largest sample size with high accuracy in a controlled and online-monitored environment. The data collected are processed in real-time for quality assessment and are available to the DAQ crew and detector experts during data taking.

   ↳ physics.ins-detnucl-exIEEE Trans.Nucl.Sci.(2021)·2 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.