Measurement of radiation damage on an epoxy-based optical glue

Huang, Hsiao-Chih; Peng, K.C; Sahu, Sarira; Ueno, K.; Chang, Y. H.; Wang, C.H; Hou, W.-S.

doi:10.1016/s0168-9002(96)01182-5

“…Considerable information is available in the literature that characterizes radiation tolerance of scintillator materials [2,3] and photosensors [4][5][6]. However, much less information is available on the radiation tolerance of optical coupling compounds that connect scintillators and their sensors [7][8][9][10]. Our observations from actual devices operating in high radiation environments are that the adhesive in the joints are visually darker than either the plastic scintillator or acrylic light guide material.…”

Section: Introductionmentioning

confidence: 99%

A study of radiation tolerance in optical cements

Tesarek

¹

,

Hahn²,

et al. 2020

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We study the effect ionizing radiation has on light transmission in the wavelength range 190–1100 nm for a number of optically clear epoxies. We find that the transmittance of traditional, commercially available, optical epoxies show significant degradation for exposures of 1×1012 MIPs/cm2. Degradation of light transmission progresses from the shortest wavelengths at low doses to longer wavelengths as the dose increases. In epoxy joints that are 0.1 mm thick, we observe that more than 5% of the light is lost for wavelengths less than 400 nm for traditional optical epoxies. Our studies have identified an optically clear epoxy that shows little degradation for radiation exposures up to 5.9× 1014 MIPs/cm2 (≈ 220 kGy).

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“…Considerable information is available in the literature that characterizes radiation tolerance of scintillator materials [2,3] and photosensors [4][5][6]. However, much less information is available on the radiation tolerance of optical coupling compounds that connect scintillators and their sensors [7][8][9][10]. Our observations from actual devices operating in high radiation environments are that the adhesive in the joints are visually darker than either the plastic scintillator or acrylic light guide material.…”

Section: Introductionmentioning

confidence: 99%

A study of radiation tolerance in optical cements

Tesarek,

Hahn,

Pla-Dalmau

et al. 2020

Preprint

0

View full text Add to dashboard Cite

We study the effect ionizing radiation has on light transmission in the wavelength range 190-1100 nm for a number of optically clear epoxies. We find that the transmittance of traditional, commercially available, optical epoxies show significant degradation for exposures of 1 × 10 12 MIPs/cm 2 . Degradation of light transmission progresses from the shortest wavelengths at low doses to longer wavelengths as the dose increases. In epoxy joints that are 0.1 mm thick, we observe that more than 5% of the light is lost for wavelengths less than 400 nm for traditional optical epoxies. Our studies have identified an optically clear epoxy that shows little degradation for radiation exposures up to 5.9 × 10 14 MIPs/cm 2 (≈ 220 kGy). K: Radiation and optical windows, Radiation hard detectors, Scintillators and scintillating fibers and light guides, Radiation damage to detector materials (solid state) A X P : 3261891Corresponding author.

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“…After 1,000 Gy, the glue began to yellow, turning darker and eventually turned brown at ~10,000 Gy. 25 At less than 20 Gy the UV-VIS absorbance for wavelengths less than 400 nm were very high compared to higher doses. 25 Huang et al point out that the DGEBA based epoxy is appropriate for radiation environments of 1 Gy/yr-the typical dose expected for epoxies employed as optical interfaces for CsI or BGO crystals in a photodiode read-out.…”

mentioning

confidence: 96%

“…25 At less than 20 Gy the UV-VIS absorbance for wavelengths less than 400 nm were very high compared to higher doses. 25 Huang et al point out that the DGEBA based epoxy is appropriate for radiation environments of 1 Gy/yr-the typical dose expected for epoxies employed as optical interfaces for CsI or BGO crystals in a photodiode read-out. 25 Due to the low γ doses studied, per the application of the glue, the experimental conditions are within an order of magnitude to the environment of the Epon 828-1031/DDS (much more relevant than the work discussed by Fouracre) 14 .…”

mentioning

confidence: 96%

“…25 Huang et al point out that the DGEBA based epoxy is appropriate for radiation environments of 1 Gy/yr-the typical dose expected for epoxies employed as optical interfaces for CsI or BGO crystals in a photodiode read-out. 25 Due to the low γ doses studied, per the application of the glue, the experimental conditions are within an order of magnitude to the environment of the Epon 828-1031/DDS (much more relevant than the work discussed by Fouracre) 14 . The conclusions of this work suggest that no radical changes are to be expected for the Epon 828-1031/DDS epoxy at a gamma dose of ~500 Gy.…”

mentioning

confidence: 99%

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