Nanosecond Time Resolution in Fission Fragment X‐Ray Lifetime Experiments Using Thin Plastic and NaI (Tl) Scintillation Detectors

1966 ◽  
Vol 37 (9) ◽  
pp. 1145-1150 ◽  
Author(s):  
L. Bridwell ◽  
M. E. Wyman
Keyword(s):  
Time Resolution ◽  
Fission Fragment ◽  
Scintillation Detectors ◽  
X Ray ◽  
Thin Plastic ◽  
Nanosecond Time Resolution

scholarly journals Si-APD linear-array x-ray detector with 10-100 μm spatial and sub-nanosecond time resolution

2016 ◽  
Author(s):  
S. Kishimoto ◽  
T. Mitsui ◽  
R. Haruki ◽  
Y. Yoda ◽  
S. Shimazaki ◽  
...  
Keyword(s):  
Time Resolution ◽  
Linear Array ◽  
X Ray ◽  
Nanosecond Time Resolution

Lightweight thin plastic foil x-ray telescopes

2002 ◽  
Author(s):  
Herbert W. Schnopper ◽  
Marco Barbera ◽  
Eric H. Silver ◽  
Russell H. Ingram ◽  
Finn E. Christensen ◽  
...  
Keyword(s):  
X Ray ◽  
Plastic Foil ◽  
Thin Plastic

scholarly journals Timing Characterization of Helium-4 Fast Neutron Detector with EJ-309 Organic Liquid Scintillator

2018 ◽  
Vol 170 ◽  
pp. 07005 ◽  
Author(s):  
Yinong Liang ◽  
Ting Zhu ◽  
Andreas Enqvist
Keyword(s):  
Fast Neutron ◽  
Time Resolution ◽  
High Speed ◽  
Liquid Scintillator ◽  
Moving Average ◽  
Organic Liquid ◽  
Scintillation Detectors ◽  
Arrival Times ◽  
Helium 4 ◽  
Constant Fraction Discriminator

Recently, the Helium-4 gas fast neutron scintillation detectors is being used in time-sensitive measurements, such time-of-flight and multiplicity counting. In this paper, a set of time aligned signals was acquired in a coincidence measurement using the Helium-4 gas detectors and EJ-309 liquid scintillators. The high-speed digitizer system is implanted with a trigger moving average window (MAW) unit combing with its constant fraction discriminator (CFD) feature. It can calculate a “time offset” to the timestamp value to get a higher resolution timestamp (up to 50 ps), which is better than the digitizer's time resolution (4 ns) [1]. The digitized waveforms were saved to the computer hard drive and post processed with digital analysis code to determine the difference of their arrival times. The full-width at half-maximum (FWHM) of the Gaussian fit was used as to examine the resolution. For the cascade decay of Cobalt-60 (1.17 and 1.33 MeV), the first version of the Helium-4 detector with two Hamamatsu R580 photomultipliers (PMT) installed at either end of the cylindrical gas chamber (20 cm in length and 4.4 cm in diameter) has a time resolution which is about 3.139 ns FWHM. With improved knowledge of the timing performance, the Helium-4 scintillation detectors are excellent for neutron energy spectrometry applications requiring high temporal and energy resolutions.

scholarly journals Chandra Studies of Supernova Remnants and Pulsars

2001 ◽  
Vol 205 ◽  
pp. 358-365
Author(s):  
Patrick Slane ◽  
John P. Hughes ◽  
Cara E. Rakowski ◽  
David N. Burrows ◽  
John A. Nousek ◽  
...  
Keyword(s):  
Time Resolution ◽  
Supernova Remnants ◽  
Angular Resolution ◽  
Fast Time ◽  
X Ray ◽  
Spatially Resolved ◽  
Unique Capability

With sub-arcsecond angular resolution accompanied by fast time resolution and spatially resolved spectral capabilities, the Chandra X-ray Observatory provides a unique capability for the study of supernova remnants (SNRs) and pulsars. Though in its relative infancy, Chandra has already returned stunning images of SNRs which reveal the distribution of ejecta synthesized in the stellar explosions, the distinct properties of the forward and reverse shocks, and the presence of faint shells surrounding compact remnants. Pulsar observations have uncovered jet features as well as small-scaled structures in synchrotron nebulae. In this brief review we discuss results from early Chandra studies of pulsars and SNRs.

Progress in HXR diagnostics at GOLEM and COMPASS tokamaks

2022 ◽  
Vol 17 (01) ◽  
pp. C01033
Author(s):  
J. Cerovsky ◽  
O. Ficker ◽  
V. Svoboda ◽  
E. Macusova ◽  
J. Mlynar ◽  
...  
Keyword(s):  
Diagnostic Tool ◽  
Runaway Electron ◽  
Sampling Rate ◽  
Data Acquisition System ◽  
Scintillation Detectors ◽  
Low Density ◽  
Runaway Electrons ◽  
X Ray ◽  
Radiation Induced ◽  
Pulse Analysis

Abstract Scintillation detectors are widely used for hard X-ray spectroscopy and allow us to investigate the dynamics of runaway electrons in tokamaks. This diagnostic tool proved to be able to provide information about the energy or the number of runaway electrons. Presently it has been used for runaway studies at the GOLEM and the COMPASS tokamaks. The set of scintillation detectors used at both tokamaks was significantly extended and improved. Besides NaI(Tl) (2 × 2 inch) scintillation detectors, YAP(Ce) and CeBr3 were employed. The data acquisition system was accordingly improved and the data from scintillation detectors is collected with appropriate sampling rate (≈300 MHz) and sufficient bandwidth (≈100 MHz) to allow a pulse analysis. Up to five detectors can currently simultaneously monitor hard X-ray radiation at the GOLEM. The same scintillation detectors were also installed during the runaway electron campaign at the COMPASS tokamak. The aim of this contribution is to report progress in diagnostics of HXR radiation induced by runaway electrons at the GOLEM and the COMPASS tokamaks. The data collected during the 12th runaway electron campaign (2020) at COMPASS shows that count rates during typical low-density runaway electron discharges are in a range of hundreds of kHz and detected photon energies go up to 10 MeV (measured outside the tokamak hall). Acquired data from experimental campaigns from both machines will be discussed.

Determination of the time resolution for neutron scintillation detectors by multi-coincidence measurement

2011 ◽  
Vol 35 (5) ◽  
pp. 475-477 ◽  
Author(s):  
Yong-Ming Li ◽  
Xi-Chao Ruan ◽  
Bin Zhou ◽  
Zhong-Yuan Ma
Keyword(s):  
Time Resolution ◽  
Coincidence Measurement ◽  
Scintillation Detectors

scholarly journals Optical Short-Time Variations in GK Persei during the 1983 Outburst

1987 ◽  
Vol 93 ◽  
pp. 485-485
Author(s):  
H. Steinle ◽  
W. Pietsck
Keyword(s):  
Accretion Disk ◽  
Time Resolution ◽  
X Rays ◽  
X Ray ◽  
Time Variations ◽  
Short Time ◽  
First Time ◽  
Calar Alto

AbstractDuring the August 1983 outburst of the old nova GK Persei observations with EXOSAT showed for the first time a 351 second periodicity in X-rays.Our fast photometry (U(B)V with 25 sec time resolution) was made at the end of the outburst in the nights of September 29 , and October 1–3 , using the 2.2 meter telescope at Calar Alto (Spain).Optical variations up to 10% in U and 4% in V with periodicities in the range 350 to 360 seconds were found, lasting only for few cycles.A comparison with the extrapolated prediction of the X-ray maxima did not show a coincidence, but rather an anticoincidence in several cases. This supports a model of reprocessed X-rays at the inner edge of an accretion disk.

REGISTRATION OF OPTICAL IMAGES OF A VACUUM ARC DISCHARGE WITH AN ELECTRON-OPTICAL CONVERTER WITH NANOSECOND TIME RESOLUTION

2020 ◽  
Vol 63 (1) ◽  
pp. 81-86
Author(s):  
S. G. Davydov ◽  
A. N. Dolgov ◽  
M. A. Karpov ◽  
A. V. Korneev ◽  
D. V. Nikishin ◽  
...  
Keyword(s):  
Time Resolution ◽  
Arc Discharge ◽  
Vacuum Arc ◽  
Optical Images ◽  
Nanosecond Time Resolution

Fast scintillation detectors for high-energy X-ray region

2012 ◽  
Vol 204 (1-3) ◽  
pp. 101-110 ◽  
Author(s):  
Shunji Kishimoto ◽  
Fumihiko Nishikido ◽  
Rie Haruki ◽  
Kengo Shibuya ◽  
Masanori Koshimizu
Keyword(s):  
High Energy ◽  
Scintillation Detectors ◽  
X Ray
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