Alanine dosimetry as the reference dosimetric system in accelerator radiation environments

Coninckx, F; Schönbacher, H.; Bartolotta, A.; Onori, S.; Rosati, Alessandra

doi:10.1016/0883-2889(89)90027-0

Cited by 39 publications

(16 citation statements)

References 4 publications

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“…The samples were irradiated with doses of 5, 30, 75, 100, 130, and 200 kGy. The absorbed doses were determined by means of an alanine dosimeter with EPR (electron paramagnetic resonance) characterization [9].…”

Section: Irradiation Methodsmentioning

confidence: 99%

CROSSLINKING OF HYDROXY-TERMINATED POLYBUTADIENE WITH⁶⁰Co-γ-RAYS

Macedo¹,

Visconte²,

Oliveira³

et al. 2004

International Journal of Polymeric Materials

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Crosslinking of hydroxy-terminated polybutadiene was carried out in the presence of functional reactive monomers like trimethylolpropane triacrylate and ditrimethylolpropane tetraacrylate, employing high-energy 60 Co-g-rays. Specimens of the crosslinked material were then no longer soluble in organic compounds such as toluene, but swelled to an extent that inversely depended on the amount of radiation to which they have been exposed, that is on the degree of crosslinking. Not all molecules were, however, linked into the network, and appreciable amounts of soluble material could be removed, which allowed the gel fraction determination. The gel content and the swelling index were found to follow the progress of the reticulation reaction.

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Section: Irradiation Methodsmentioning

confidence: 99%

CROSSLINKING OF HYDROXY-TERMINATED POLYBUTADIENE WITH⁶⁰Co-γ-RAYS

Macedo¹,

Visconte²,

Oliveira³

et al. 2004

International Journal of Polymeric Materials

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“…17 MeV, E 2 = 1.33 MeV) sources in the dose range from 1 Gy to 5 10 3 Gy. The results are presented in Fig.…”

Section: Dosimetrymentioning

confidence: 99%

“…An alanine dosimeter [10,16,17] uses the stable paramagnetic centers generated by ionizing radiation in the -amino acid: CH 3 CHNH 2 -COOH. An unpaired electron resulting from the breaking of a carbon covalent band is detected by the electron spin resonance (ESR) technique.…”

Section: Dosimetrymentioning

confidence: 99%

Large-scale samples irradiation facility at the IBR-2 reactor in Dubna

Cheplakov

Golikov

Golubyh

et al. 1998

Nuclear Instruments and Methods in Physics Research Section A:

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The irradiation facility at the beam line no.3 of the IBR-2 reactor of the Frank Laboratory for Neutron Physics is described. The facility is aimed at irradiation studies of various objects with area up to 800 cm 2 both at cryogenic and ambient temperatures. The energy spectra of neutrons are reconstructed by the method of threshold detector activation. The neutron uence and dose rates are measured by means of alanine and thermoluminescent dosimeters. The boron carbide and lead lters or (n= ) converter provide beams of di erent ratio of doses induced by neutrons and photons. For the lead lter, the ux of fast neutrons with energy more than 0.1 MeV is 1:4 10 10 n c m 2 s 1 and the neutron dose is about 96% of the total radiation dose. For the (n= ) converter, the dose rate is 500 Gy h 1 which is about 85% of the total dose. The radiation hardness tests of GaAs electronics and materials for the ATLAS detector to be put into operation at the Large Hadron Collider (LHC) have been performed successfully at this facility.

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“…From the beginning of operation in 1989, the absorbed doses in the LEP tunnel were measured by means of polymer-alanine dosimeters (PADs) [4,5], as well as by hydrogenpressure dosimeters (HPDs) [6,7] during the last two years when the dose levels were very high on magnet coils. Several hundred points were under dosimetric control, and the results have been published every year [8].…”

Section: Radiation Doses In Lepmentioning

confidence: 99%

Absorbed doses and radiation damage during the 11 years of LEP operation

Schönbacher

Tavlet

2004

Nuclear Instruments and Methods in Physics Research Section B:

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During the 11 years of operation of the Large Electron Positron Collider (LEP), synchrotron radiation was emitted in the tunnel. This ionizing radiation induced degradation in organic insulators and structural materials, as well as in electronics. Annual dosimetric measurements have shown that the level of radiation increased with the ninth power of the beam energy.During the machine shut-downs and at the end of the operation, samples of rigid and flexible polymeric insulators (magnet-coil resins and cable insulations) were taken out and checked for their integrity. The test results are compared with the results obtained during the qualification of the materials, 12 to 15 years ago. At that time, lifetime predictions were done; they are now compared with the real time aged materials.Submitted for publication in Nuclear Instruments and Methods B CERN,

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Alanine dosimetry as the reference dosimetric system in accelerator radiation environments

Cited by 39 publications

References 4 publications

CROSSLINKING OF HYDROXY-TERMINATED POLYBUTADIENE WITH⁶⁰Co-γ-RAYS

CROSSLINKING OF HYDROXY-TERMINATED POLYBUTADIENE WITH⁶⁰Co-γ-RAYS

Large-scale samples irradiation facility at the IBR-2 reactor in Dubna

Absorbed doses and radiation damage during the 11 years of LEP operation

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Alanine dosimetry as the reference dosimetric system in accelerator radiation environments

Cited by 39 publications

References 4 publications

CROSSLINKING OF HYDROXY-TERMINATED POLYBUTADIENE WITH60Co-γ-RAYS

CROSSLINKING OF HYDROXY-TERMINATED POLYBUTADIENE WITH60Co-γ-RAYS

Large-scale samples irradiation facility at the IBR-2 reactor in Dubna

Absorbed doses and radiation damage during the 11 years of LEP operation

Contact Info

Product

Resources

About

CROSSLINKING OF HYDROXY-TERMINATED POLYBUTADIENE WITH⁶⁰Co-γ-RAYS

CROSSLINKING OF HYDROXY-TERMINATED POLYBUTADIENE WITH⁶⁰Co-γ-RAYS