Dosimetry of high-energy electron linac produced photoneutrons and the bremsstrahlung gamma-rays using TLD-500 and TLD-700 dosimeter pairs

Mukherjee, Bhaskar; Makowski, Dariusz; Simrock, S.

doi:10.1016/j.nima.2005.03.120

Cited by 19 publications

(17 citation statements)

References 18 publications

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“…The TL-output of the 8th batch (background/control) was subtracted from the readings of the other seven batches to obtain the net TLD-output (Mukherjee et al, 2005). The TLD-outputs, proportional to bremsstrahlung photon dose, were normalised with the output of the unattenuated batch (i).…”

Section: Estimation Of Bremsstrahlung Spectrum (Experiments 3)mentioning

confidence: 99%

“…We have used radiochromic (type: GAF-chromic) dosimeter films (Soares, 2006) for longterm gamma dose assessments. Thermoluminescent dosimeters (Mukherjee et al, 2005) and superheated emulsion (bubble) detectors (Agosteo et al, 2000;Vanhavere et al, 1998) have also been used to estimate the gamma and neutron doses during various accelerator operation conditions. Application of passive radiation detectors in accelerator dosimetry has been discussed in detail elsewhere .…”

Section: Introductionmentioning

confidence: 99%

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Accelerator dosimetry at free electron lasers in Hamburg

Mukherjee

Simrock

2008

Radiation Measurements

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Section: Estimation Of Bremsstrahlung Spectrum (Experiments 3)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Accelerator dosimetry at free electron lasers in Hamburg

Mukherjee

Simrock

2008

Radiation Measurements

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“…Thermal neutrons and neutrons produced via Giant Dipole Resonance reaction (GDR) with peak energy between 2 and 3 MeV are mainly present in the accelerator tunnel. The number of higher-energy neutrons generated via pseudo-deuteron and photopion reaction are a few orders of magnitude lower than GDR neutrons [3].…”

Section: B Main Control System Of the X-felmentioning

confidence: 89%

“…Exemplary neutron energy spectra, calculated using MCNP 4A, for Linac II accelerator (DESY) and the Americium Beryllium 241AmBe(a,n) source is presented in Fig. 2 [3].…”

Section: B Main Control System Of the X-felmentioning

confidence: 99%

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A distributed System for Radiation Monitoring at Linear Accelerators

Makowski

Grecki

Napieralski

et al. 2005

2005 8th European Conference on Radiation and Its Effects on Components and Systems

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The paper presents a system for an on-line neutron fluence monitoring at a linear accelerator. The system consists of a SRAM-based detector and a radiation-tolerant read-out system. The neutron fluence is measured in several locations of the accelerator. Monitoring of the radiation environment in an accelerator tunnel is necessary to assure a reliable long-term operation of electronic systems placed in the tunnel. The monitoring of the chamber is especially important during the design stage of a linear accelerator. The new design of 20 GeV linear accelerator X-FEL (X-ray Free Electron Laser) is currently approved for construction at DESY Research Centre in Hamburg [1], [2]. The presented paper is based on our research and experimental measurement carried out at 1.2 GeV superconducting electron linac driving the VUV-FEL. The application of a pair of TLD-700 and TLD-500 or superheated emulsion (bubble) dosimeters enables the supervision of neutrons fluence in accelerators [3]. This process requires continuous and arduous calibration of TLD, therefore this method is not convenient. Moreover, it is impossible to monitor the radiation environment in real time. The presented system fill the market nitche of real-time neutron monitoring for high-energy accelerators. Neutron fluence and gamma dose measured in this way can be used for the detailed analysis of the VUV-FEL or X-FEL environments. Monitoring of the radioactive area in a linear accelerator tunnel could be helpful to diagnose and reduce beam losses [4], [5]. We have conducted experiments with the distributed system dedicated to neutron flux measurement at the DESY Research Centre in Hamburg. The devices were exposed to a neutron field from an Americium-Beryllium (n, a) source 241AmBe. The systems were installed in two accelerators: Linac II and VUV-FEL.

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