New DAQ System for the CANDLES Experiment

Suzuki, K.; Ajimura, S.; Chan, W. M.; Fushimi, K.; Hazama, R.; Ichimura, Kunihiro; Iida, Tsutomu; Inukai, Y.; Kakubata, H.; Kishimoto, T.; Maeda, Sumihiro; Maeda, Tsuyoshi; Matsuoka, K.; Nakajima, K.; Nakatani, Noboru; Nomachi, M.; Ogawa, Izumi; Ohata, Toshihiro; Ohsumi, H.; Sakamoto, K.; Tamagawa, Y.; Tanaka, Daisuke; Tetsuno, K.; Trang, V. T. T.; Umehara, S.; Wang, W.; Yoshida, S.; Yoshizawa, M.

doi:10.1109/tns.2015.2423673

Cited by 7 publications

(8 citation statements)

References 14 publications

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“…Following the trigger, 8-bit 500 MHz flash analog-to-digital converters (FADCs) opened a 8,960-ns window and read out all PMT waveforms. Details of the CANDLES DAQ system are summarized in [13,14].…”

Section: Detector Overviewmentioning

confidence: 99%

The energy calibration system for CANDLES using (n,γ) reaction

Iida

Mizukoshi

Ohata

et al. 2021

Nuclear Instruments and Methods in Physics Research Section A:

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CAlcium fluoride for the study of Neutrinos and Dark matters by Low-energy Spectrometer (CANDLES) is searching for neutrino-less double-beta decay of 48 Ca using a CaF 2 scintillator array. A high Q-value of 48 Ca at 4,268 keV enabled us to achieve low background, however, at the same time it causes difficulties in calibrating the detector's Q-value region because of the absence of a standard high-energy γ-ray source. Therefore, we have developed a novel calibration system based on γ-ray emission by neutron capture on 28 Si, 56 Fe, and 58 Ni nuclei. In this paper, we report the development of the new calibration system as well as the results of energy calibration in CANDLES up to 9 MeV.

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Section: Detector Overviewmentioning

confidence: 99%

The energy calibration system for CANDLES using (n,γ) reaction

Iida

Mizukoshi

Ohata

et al. 2021

Nuclear Instruments and Methods in Physics Research Section A:

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“…Following the trigger, 8-bit 500 MHz flash analogto-digital converters (FADCs) opened a 8,960-ns window and read out all PMT waveforms. Details of the CANDLES DAQ system are summarized in [10,11].…”

Section: Detector Overviewmentioning

confidence: 99%

The energy calibration system for CANDLES using (n, γ) reaction

Iida,

Mizukoshi,

Ohata

et al. 2020

Preprint

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CAlcium fluoride for the study of Neutrinos and Dark matters by Low-energy Spectrometer (CANDLES) searches for neutrino-less double beta decay of 48 Ca using a CaF 2 scintillator array. A high Q-value of 48 Ca at 4,272 keV enabled us to achieve very low background condition, however, at the same it causes difficulties in calibrating the detector's Q-value region because of the absence of a standard high-energy γ-ray source. Therefore, we have developed a novel calibration system based on γ-ray emission by neutron capture on 28 Si, 56 Fe and 58 Ni nuclei. In the paper, we report the development of the new calibration system as well as the results of energy calibration in CANDLES up to 9 MeV.

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“…Figure 6 is the comparison of SpaceWire network of previous ATCA DAQ system and new µTCA DAQ system. In previous DAQ system [4] [12], a SpaceWire-to-PCIe (PCI express) interface was used. This setup has short latency, but it is not convenient due to two reasons.…”

Section: A Spacewire and Remote Memory Access Protocolmentioning

confidence: 99%

“…DAQ data taking efficiency of µTCA with 8 buffers (red circle) and 3 buffers (black down-triangle). DAQ performance of µTCA system is compared with previous ATCA system (red up-triangle) [4]. readout time of µTCA is a half of ATCA system.…”

Section: Daq Performancementioning

confidence: 99%

$\mu$ TCA DAQ System and Parallel Reading in CANDLES Experiment

Khai

Ajimura

Kanagawa

et al. 2019

IEEE Trans. Nucl. Sci.

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A new µTCA DAQ system was introduced in CANDLES experiment with SpaceWire-to-GigabitEthernet (SpaceWire-GigabitEthernet) network for data readout and Flash Analog-to-Digital Converters (FADCs). With SpaceWire-GigabitEthernet, we can construct a flexible DAQ network with multi-path access to FADCs by using off-the-shelf computers. FADCs are equipped 8 event buffers, which act as de-randomizer to detect sequential decays from the background. SpaceWire-GigabitEthernet has high latency (about 100 µsec) due to long turnaround time, while GigabitEthernet has high throughput. To reduce dead-time, we developed the DAQ system with 4 "crateparallel" (modules in crates are read in parallel) reading threads. As a result, the readout time is reduced by 4 times: 40 msec down to 10 msec. With improved performance, it is expected to achieve higher background suppression for CANDLES experiment. Moreover, for energy calibration, "event-parallel" reading process (events are read in parallel) is also introduced to reduce measurement time. With 2 "event-parallel" reading processes, the data rate is increased 2 times.

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New DAQ System for the CANDLES Experiment

Cited by 7 publications

References 14 publications

The energy calibration system for CANDLES using (n,γ) reaction

The energy calibration system for CANDLES using (n,γ) reaction

The energy calibration system for CANDLES using (n, γ) reaction

$\mu$ TCA DAQ System and Parallel Reading in CANDLES Experiment

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