I. Britvitch

Performance study of the gamma-ray bursts polarimeter POLAR

Jianchao Sun, Bobing Wu, T. W. Bao, T. Batsch et autres

The Gamma-ray Burst Polarimeter-POLAR is a highly sensitive detector which is dedicated to the measurement of GRB’s polarization with a large effective detection area and a large field of view (FOV). The optimized performance of POLAR will contribute to the capture and …

pl, ch (code pays fourni par la source)

The Gamma-Ray Burst Polarimeter - POLAR onboard the China’s Spacelab “Tiangong-2”

Jianchao Sun, T. W. Bao, T. Batsch, I. Britvitch et autres

Prospects of the Hard X-Ray Instrument POLAR to Measure Polarization of Solar Flares

W. Hajdas, T. W. Bao, T. Batsch, I. Britvitch et autres

In-depth studies of solar flares emissions and energy releases include analyses of polarization data. Polarization gives clear information about mechanisms and processes leading to electron acceleration and photon production. Despite of many past attempts, the key energy range of hard X-rays was …

ch, cn, pl (code pays fourni par la source)

POLAR: the Space Experiment to Study the Origin of Gamma Ray Bursts

A. Zwolińska, T. W. Bao, T. Batsch, I. Britvitch et autres

For certain combinations of protons and neutrons, there is a theoretical expectation that the shape of nuclei can assume octupole deformation, which would give rise to reflection asymmetry or a "pear shape" in the intrinsic frame, either dynamically (octupole vibrations) or statically …

gb (code pays fourni par la source)

Overcoming non-uniformity limits for space-borne hard X-ray polarimeter POLAR based on scintillators and multi-anode photo-multipliers

W. Hajdas, T. M. Spieker, D. Rybka, R. Marcinkowski et autres

The main performance challenge of POLAR - a novel hard X-ray polarimeter, is to achieve high statistical accuracy and large modulation factors. Both require great level of response uniformity. Though, typical sensitivity of multi-anode PMTs may vary between its channels up to …

ch, de, cn, pl (code pays fourni par la source)

Development of the Central Task Processing Unit for space-borne Gamma-Ray Burst polarimeter, POLAR

D. Rybka, R. Marcinkowski, Wojtek Hajdas, I. Britvitch et autres

POLAR, a joint European-Chinese experiment, is a novel compact space-borne Compton polarimeter conceived and optimized for detection of the prompt emission of Gamma-Ray Bursts (GRB) and precise measurements of polarization in the hard X-ray energy range 50-500 keV. The complete instrument consists …

ch, pl, cn (code pays fourni par la source)

Real-Time Beam Profile Uniformity Monitoring System

I. Britvitch, W. Hajdas, S. Scherrer, Ken Egli et autres

New, multi-pixel, air-filled ionization chamber for beam monitoring was constructed. For processing of 400 input signals, it utilizes a dedicated, homemade ASIC. Device parameters: sensitivity, resolution, dynamic range, etc. are discussed together with results from the particle beam tests.

ch (code pays fourni par la source)

The Next Generation Radiation Monitor- NGRM

L. Desorgher, W. Hajdas, I. Britvitch, Ken Egli et autres

The ESA Next Generation Radiation Monitor (NGRM) will be the successor of the ESA Standard Radiation Environment Monitor (SREM) that is still measuring near-Earth and interplanetary space radiation environment onboard 6 different spacecrafts. NGRM will measure protons from 2 MeV up to …

ch, fr, no (code pays fourni par la source)

POLAR Front-End Electronics: Concept, performance and qualification tests

R. Marcinkowski, Wojtek Hajdas, D. Rybka, I. Britvitch et autres

POLAR is a space instrument designed for measurements of the polarization of the prompt hard X- and gamma-ray emission from the Gamma Ray Bursts (GRB). POLAR consists of 25 identical Detection Modules equipped with Front-End Electronics (FEE) units. This paper describes: design, …

ch, pl, cn (code pays fourni par la source)

ESA Next Generation Radiation Monitor

L. Desorgher, W. Hajdas, I. Britvitch, Ken Egli et autres

The ESA Next Generation Radiation Monitor (NGRM), currently under development, will be the successor of the ESA Standard Radiation Environment Monitor (SREM) that is still measuring near-Earth and interplanetary space radiation environment onboard 6 different spacecrafts. NGRM will measure protons from 2 …

ch, fr, no, nl (code pays fourni par la source)

Realisation of Events Trigger System for Space-borne Gamma-Ray Burst Polarimeter, POLAR

D. Rybka, Wojtek Hajdas, I. Britvitch, R. Marcinkowski et autres

POLAR experiment is a novel compact space-borne Compton polarimeter conceived for a precise measurement of hard X-ray polarization and optimized for the detection of the prompt emission of Gamma-Ray Bursts (GRB) in the energy range 50-500 keV. The detector consists of an …

POLAR: the first dedicated gamma-ray burst polarization experiment

T. W. Bao, T. Batsch, I. Britvitch, F. Cadoux et autres

POLAR is a Gamma-Ray Burst (GRB) polarization experiment in the energy range 50-500 keV. Detection principle of the gamma-ray polarization is based on the anisotropy of the Compton scattering. POLAR consists of 1600 low-Z plastic scintillator bars, read out by 25 flat-panel …

pl, ch (code pays fourni par la source)