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Volume 67 (2022): Issue 3 (September 2022)

Volume 67 (2022): Issue 2 (June 2022)

Volume 67 (2022): Issue 1 (March 2022)

Volume 66 (2021): Issue 4 (December 2021)

Volume 66 (2021): Issue 3 (September 2021)

Volume 66 (2021): Issue 2 (June 2021)

Volume 66 (2021): Issue 1 (March 2021)

Volume 65 (2020): Issue 4 (December 2020)

Volume 65 (2020): Issue 3 (September 2020)

Volume 65 (2020): Issue 2 (June 2020)

Volume 65 (2020): Issue 1 (March 2020)

Volume 64 (2019): Issue 4 (December 2019)

Volume 64 (2019): Issue 3 (September 2019)

Volume 64 (2019): Issue 2 (June 2019)

Volume 64 (2019): Issue 1 (March 2019)

Volume 63 (2018): Issue 4 (December 2018)

Volume 63 (2018): Issue 3 (September 2018)

Volume 63 (2018): Issue 2 (June 2018)

Volume 63 (2018): Issue 1 (March 2018)

Volume 62 (2017): Issue 4 (December 2017)

Volume 62 (2017): Issue 3 (September 2017)

Volume 62 (2017): Issue 2 (June 2017)

Volume 62 (2017): Issue 1 (March 2017)

Volume 61 (2016): Issue 4 (December 2016)

Volume 61 (2016): Issue 3 (September 2016)

Volume 61 (2016): Issue 2 (June 2016)

Volume 61 (2016): Issue 1 (March 2016)

Volume 60 (2015): Issue 4 (December 2015)

Volume 60 (2015): Issue 3 (September 2015)

Volume 60 (2015): Issue 2 (June 2015)

Volume 60 (2015): Issue 1 (March 2015)

Volume 59 (2014): Issue 4 (December 2014)

Volume 59 (2014): Issue 3 (August 2014)

Volume 59 (2014): Issue 2 (June 2014)

Volume 59 (2014): Issue 1 (March 2014)

Journal Details
Format
Journal
eISSN
1508-5791
First Published
25 Mar 2014
Publication timeframe
4 times per year
Languages
English

Search

Volume 67 (2022): Issue 3 (September 2022)

Journal Details
Format
Journal
eISSN
1508-5791
First Published
25 Mar 2014
Publication timeframe
4 times per year
Languages
English

Search

2 Articles

Original Paper

Open Access

Observation of intrapulse energy switching in standing-wave electron linac

Published Online: 08 Oct 2022
Page range: 43 - 47

Abstract

Abstract

For the development of an effective cargo-scanning system, an intrapulse energy switching has been tested at the National Centre for Nuclear Research (NCBJ) with the possibility to change the beam energy within a 4 μs pulse of the linear electron accelerator (linac). Modification of the electron energy is achieved through the beam-loading effect in a standing-wave accelerating structure equipped with a triode gun. Construction of the machine and the achieved results are presented in this article.

Keywords

  • Cargo scanning
  • Dual-energy imaging
  • X-ray imaging

Technical Report

Open Access

Recent upgrading of the nanosecond pulse radiolysis setup and construction of laser flash photolysis setup at the Institute of Nuclear Chemistry and Technology in Warsaw, Poland

Published Online: 08 Oct 2022
Page range: 49 - 64

Abstract

Abstract

Modification of pulse radiolysis (PR) setup and construction of a new laser flash photolysis (LFP) setup at the Institute of Nuclear Chemistry and Technology (INCT) is described. Both techniques are dedicated to studying fast reactions in real time by direct observation of transients. Time resolution of the PR setup at INCT was ~11 ns, limited by the duration of the electron pulse. Implementation of a new spectrophotometric detection system resulted in a significant broadening of experimental spectral range with respect to the previous setup. Noticeable reduction of the noise-to-signal ratio was also achieved. The LFP system was built from scratch. Its time resolution was ~6 ns, limited by the duration of a laser pulse. LFP and PR were purposely designed to share the same hardware and software solutions. Therefore, components of the detection systems can be transferred between both setups, significantly lowering the costs and shortening the construction/upgrading time. Opened architecture and improved experimental flexibility of both techniques were accomplished by implementation of Ethernet transmission control protocol/Internet protocol (TCP/IP) communication core and newly designed software. This is one of the most important enhancements. As a result, new experimental modes are available for both techniques, improving the quality and reducing the time of data collections. In addition, both systems are characterized by relatively high redundancy. Currently, implementation of new equipment into the systems hardly ever requires programming. In contrast to the previous setup, daily adaptations of hardware to experimental requirements are possible and relatively easy to perform.

Keywords

  • Computer-controlled systems
  • Data collection software
  • Data processing software
  • Laser flash photolysis
  • Pulse radiolysis
  • Time-resolved techniques
2 Articles

Original Paper

Open Access

Observation of intrapulse energy switching in standing-wave electron linac

Published Online: 08 Oct 2022
Page range: 43 - 47

Abstract

Abstract

For the development of an effective cargo-scanning system, an intrapulse energy switching has been tested at the National Centre for Nuclear Research (NCBJ) with the possibility to change the beam energy within a 4 μs pulse of the linear electron accelerator (linac). Modification of the electron energy is achieved through the beam-loading effect in a standing-wave accelerating structure equipped with a triode gun. Construction of the machine and the achieved results are presented in this article.

Keywords

  • Cargo scanning
  • Dual-energy imaging
  • X-ray imaging

Technical Report

Open Access

Recent upgrading of the nanosecond pulse radiolysis setup and construction of laser flash photolysis setup at the Institute of Nuclear Chemistry and Technology in Warsaw, Poland

Published Online: 08 Oct 2022
Page range: 49 - 64

Abstract

Abstract

Modification of pulse radiolysis (PR) setup and construction of a new laser flash photolysis (LFP) setup at the Institute of Nuclear Chemistry and Technology (INCT) is described. Both techniques are dedicated to studying fast reactions in real time by direct observation of transients. Time resolution of the PR setup at INCT was ~11 ns, limited by the duration of the electron pulse. Implementation of a new spectrophotometric detection system resulted in a significant broadening of experimental spectral range with respect to the previous setup. Noticeable reduction of the noise-to-signal ratio was also achieved. The LFP system was built from scratch. Its time resolution was ~6 ns, limited by the duration of a laser pulse. LFP and PR were purposely designed to share the same hardware and software solutions. Therefore, components of the detection systems can be transferred between both setups, significantly lowering the costs and shortening the construction/upgrading time. Opened architecture and improved experimental flexibility of both techniques were accomplished by implementation of Ethernet transmission control protocol/Internet protocol (TCP/IP) communication core and newly designed software. This is one of the most important enhancements. As a result, new experimental modes are available for both techniques, improving the quality and reducing the time of data collections. In addition, both systems are characterized by relatively high redundancy. Currently, implementation of new equipment into the systems hardly ever requires programming. In contrast to the previous setup, daily adaptations of hardware to experimental requirements are possible and relatively easy to perform.

Keywords

  • Computer-controlled systems
  • Data collection software
  • Data processing software
  • Laser flash photolysis
  • Pulse radiolysis
  • Time-resolved techniques

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