Enhancing the Detector for Advanced Neutron Capture Experiments

Couture, A.; Mosby, S.; Baramsai, B.; Jändel, M.; Macon, K. T.; O’Donnell, J. M.; Rusev, G.; Taddeucci, T.N.; Ullmann, J. L.; Walker, C.

doi:10.1051/epjconf/20159307003

Cited by 2 publications

(2 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A 20 to 1 compression factor is achieved by only extracting and recording the essential information of each waveform. In the upgrade of the data acquisition system, all of the digitizers are replaced with CAEN VX1730 digitizers [8]. The onboard field-programmable gate array (FPGA) runs with the standard pulse shape discrimination (PSD) firmware to generate self-triggers and extract essential information of valid signals.…”

Section: Introductionmentioning

confidence: 99%

Real-time digital trigger system for GTAF-II at CSNS Back-n white neutron source

Xie¹,

Cao²,

Yu³

et al. 2021

J. Inst.

View full text Add to dashboard Cite

A 4-π detector array composed of 40 BaF_2 crystals named Gamma Total Absorption Facility II (GTAF-II) is designed for neutron capture cross-section (n, γ) measurements at Back-n white neutron source in China Spallation Neutron Source. The waveform digitizing (WFD) method is used to acquire the detector signals from GTAF-II accurately. To reduce the high data rate caused by the WFD method, a real-time digital trigger system is proposed in this paper. The trigger system is divided into local and global trigger processing to distinguish desired signals from various noises. The local trigger processing rejects photomultiplier noises and α particles by signal characteristics. The global trigger verification eliminates natural γ-rays according to the (n, γ) reaction mechanism. In order to realize the interaction between the local and global trigger processing, a high-precision global synchronization and trigger exchange network is constructed. Experiments with beams at back-n show that the trigger system provides a high data reduction factor. This trigger system covers the entire neutron energy range of 25 ms without dead time, and desired signals are acquired with full waveforms.

show abstract

Section: Introductionmentioning

confidence: 99%

Real-time digital trigger system for GTAF-II at CSNS Back-n white neutron source

Xie¹,

Cao²,

Yu³

et al. 2021

J. Inst.

View full text Add to dashboard Cite

show abstract

“…We also used earlier experimental data from 235 U(n, f ) taken in the 2011 beam cycles to benchmark the applicability of the ratio method outlined in [14]. The latest data were collected in 2015 when the DANCE Data Acquisition System (DAQ) was upgraded with 14 bit, 500 MHz, V1730B CAEN digitizers [15]. The DAQ upgrade gives us an advantage to continue the measurement over the entire 50 ms of a beam spill rather than the 500 µs limit of the old DAQ.…”

Section: Introductionmentioning

confidence: 99%

Radiative neutron capture cross section from U236

et al. 2017

Self Cite

View full text Add to dashboard Cite

The 236 U(n, γ) reaction cross section has been measured for the incident neutron energy range from 10 eV to 800 keV using the DANCE γ-ray calorimeter at the Los Alamos Neutron Science Center. The cross section was determined with the ratio method, a novel technique using the 235 U(n, f ) reaction as a reference. The results of the experiment are reported in the resolved and unresolved resonance energy regions. Individual neutron resonance parameters were obtained below 1 keV incident energy using the R-Matrix code sammy. The cross section in the unresolved resonance region is determined with improved experimental uncertainty. It agrees with both ENDF/B-VII.1 and JEFF-3.2 nuclear data libraries. The results above 10 keV agree better with the JEFF-3.2 library.

show abstract

Enhancing the Detector for Advanced Neutron Capture Experiments

Cited by 2 publications

References 14 publications

Real-time digital trigger system for GTAF-II at CSNS Back-n white neutron source

Real-time digital trigger system for GTAF-II at CSNS Back-n white neutron source

Radiative neutron capture cross section from U236

Contact Info

Product

Resources

About