Effects of proton irradiation on triboluminescent materials such as ZnS:Mn

Hollerman, W.A.; Goedeke, S.M.; Bergeron, N.P.; Muntele, C.; Allison, S. W.; Ila, D.

doi:10.1016/j.nimb.2005.07.072

Cited by 27 publications

(15 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The pressure in the PIGE beamline during these measurements was less than 1 µtorr. The resulting average N 1/2 for EuD 4 TEA irradiated with 3 MeV protons was measured to be (2.83 ± 0.19) x 10 10 mm -2 , which is 0.03% of the value measured for ZnS:Mn 21 . In fact, EuD 4 TEA has the smallest measured N 1/2 11-23 , which makes perfect sense, since it is an organic compound.…”

Section: Resultsmentioning

confidence: 71%

“…The paint was made by mixing a 3:1 ratio of purpose-made EuD 4 TEA crystals to a polysiloxane binder by mass. Polysiloxane has been used in earlier research as the binding agent for paints [11][12][13][14][15][16][17][18][19][20][21][22][23] . This thick paint was spread on each aluminum card using a technique that is analogous to applying butter to sliced bread.…”

Section: Sample Preparationmentioning

confidence: 99%

“…Selected 3 MeV proton N 1/2 data for several inorganic luminescent materials at ambient temperature5,[11][12][13][14][15][16][17][18][19][20][21][22][23] .From 1990 to 1996, Hollerman et al completed an intensive research program for the Department of Defense to determine the effects of proton irradiation on the relative fluorescence emission yield for selected yttrium and gadolinium based luminescent materials 5,24-25 . These materials were selected for high efficiency, fast prompt fluorescence response, and minimal delayed fluorescence.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Using luminescent materials as the active element for radiation sensors

et al. 2016

View full text Add to dashboard Cite

Ionizing radiation poses a significant challenge for Earth-based defense applications as well as human and/or robotic space missions. Practical sensors based on luminescence will depend heavily upon research investigating the resistance of these materials to ionizing radiation and the ability to anneal or self-heal from damage caused by such radiation. In 1951, Birks and Black showed experimentally that the luminescent efficiency of anthracene bombarded by alphas varies with total fluence (N) as (I/I 0 ) = 1/(1 + AN), where I is the luminescence yield, I 0 is the initial yield, and A is a constant. The half brightness (N 1/2 ) is defined as the fluence that reduce the emission light yield to half and is equal to is the inverse of A. Broser and Kallmann developed a similar relationship to the Birks and Black equation for inorganic phosphors irradiated using alpha particles. From 1990 to the present, we found that the Birks and Black relation describes the reduction in light emission yield for every tested luminescent material except lead phosphate glass due to proton irradiation. These results indicate that radiation produced quenching centers compete with emission for absorbed energy. The purpose of this paper is to present results from research completed in this area over the last few years. Particular emphasis will be placed on recent measurements made on new materials such as europium tetrakis dibenzoylmethide triethylammonium (EuD 4 TEA). Results have shown that EuD 4 TEA with its relatively small N 1/2 might be a good candidate for use as a personal proton fluence sensor.

show abstract

Section: Resultsmentioning

confidence: 71%

Section: Sample Preparationmentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Using luminescent materials as the active element for radiation sensors

et al. 2016

View full text Add to dashboard Cite

show abstract

“…where I is the fluorescent light intensity (arbitrary units); I 0 is the initial fluorescent light intensity; t is the time since cessation of excitation source (s); and t, prompt fluorescent decay time, is defined as the time required to decay the light intensity to e 21 (36.8%) of its original value. 42 The inset of Figure 3(b) shows fitted curve of the tail of TL signal from ZnS:Mn crystals. The fitted curve follows equation ( 4), which confirms the signal generation by the ITOF sensor at the adhesive failure.…”

Section: Double Cantilever Beammentioning

confidence: 99%

Real-time damage monitoring in trailing edge bondlines of wind turbine blades with triboluminescent sensors

Shohag

Ndebele

Okoli

2018

Structural Health Monitoring

View full text Add to dashboard Cite

Adhesively bonded joints in wind turbine blades, particularly trailing edge joints, are prone to damage due to highintensity stress concentrations, missing adhesive, or deficient bonds at the bonding surfaces. If not detected early, cracks or disbonds in the trailing edge might propagate rapidly resulting in catastrophic failure of the whole blade. No dedicated in situ sensor system is, as of now, available for real-time damage monitoring in the critical adhesively bonded joints. This article discusses the use of in situ triboluminescent optical fiber sensors for damage monitoring in adhesively bonded composite joints. Double cantilever beam and three-point bend end-notched flexure samples were fabricated from a thick glass fiber/vinyl ester composite and glued with a two-part methacrylate-based structural adhesive. The in situ triboluminescent optical fiber sensors were embedded into the adhesive layer. Double cantilever beam and three-point bend end-notched flexure tests were performed to determine the mode I and mode II fracture toughness of the adhesive joints, respectively. The results show that the triboluminescent emissions occur at the onset of damage when performing double cantilever beam and three-point bend end-notched flexure fracture tests on adhesively bonded composite panels of different adhesive thicknesses. The triboluminescent response increases with the fracture toughness of adhesive joints. The double cantilever beam and three-point bend end-notched flexure specimens undergo cohesive failure in the adherend thickness. Optical microscopy was utilized to obtain better insights of fracture lines. Results indicate that in situ triboluminescent optical fiber sensors can monitor damage in adhesive in real-time without generating false alarms.

show abstract

“…The fluorescence decay time is unique to each material and can be defined as the time needed to reduce the light intensity to e À 1 (36.8%) of its original value [75]. The reduction in light intensity from the cessation of excitation is a simple decaying exponential for many luminescent materials [1,6,76,77] and is given by the relation [78]:…”

Section: Meso-velocity Impact (100 M/s-1 Km/s)mentioning

confidence: 99%