The response function of Fujifilm BAS-TR imaging plates to laser-accelerated titanium ions

Abstract

Calibrated diagnostics for energetic particle detection allow for the systematic study of charged particle sources. The Fujifilm BAS-TR imaging plate (IP) is a reusable phosphorescent detector for radiation applications such as x-ray and particle beam detection. The BAS-TR IP has been absolutely calibrated to many low-Z (low proton number) ions, and extending these calibrations to the mid-Z regime is beneficial for the study of laser-driven ion sources. The Texas Petawatt Laser was used to generate energetic ions from a 100 nm titanium foil, and charge states Ti10+ through Ti12+, ranging from 6 to 27 MeV, were analyzed for calibration. A plastic detector of CR-39 with evenly placed slots was mounted in front of the IP to count the number of ions that correspond with the IP levels of photo-stimulated luminescence (PSL). A response curve was fitted to the data, yielding a model of the PSL signal vs ion energy. Comparisons to other published response curves are also presented, illustrating the trend of PSL/nucleon decreasing with increasing ion mass.

Monte Carlo Study of Imaging Plate Response to Laser-Driven Aluminum Ion Beams

“…This is because the incident ions quickly arrive at an equilibrium charge state as soon as they enter the target surface. This characteristic is assumed by Freeman et al [23], and is confirmed by Doria et al [6] and J. Strehlow et al [27] in experiments using multiply charged carbon ions and titanium ions, respectively. Therefore, we do not need to specify the charge state of Al ions incident on the BAS-TR IP in our SRIM simulations.…”

“…The measurement of IP responses to energetic heavy ion beams, however, is more challenging because it is difficult to produce heavy ion beams with sufficient particle fluence for IP calibration at a range of energies in a reasonably short time. For this reason, the published studies of IP response to ions are limited to a few types of heavier elements such as deuterium [23,26], helium [16,23], carbon [6], and titanium [27].…”

Calibration of BAS-TR image plate response to GeV gold ions

“…The IPs are widely used in laser-plasma experiments due to their non-disposable nature (i.e., the signal on the IP can be erased after every use), high dynamic range (∼10 5 ), and high spatial resolution (up to 10 µm). In order to make the IP an absolute ion flux detector, different types of IPs have been absolutely calibrated for several ion species (e.g., protons 12 , deuterium 13 , carbon 14 , titanium 15 , and silver and xenon ions 16 ) by using laser-driven ion beams. In light of the emerging acceleration mechanisms that can accelerate heavy ions efficiently, it is crucial to calibrate the response of IPs to energetic heavier ions.…”

Calibration of BAS-TR image plate response to GeV gold ions

“…The IPs are widely used in laser-plasma experiments due to their non-disposable nature (i.e., the signal on the IP can be erased after every use), high dynamic range (∼10 5 ), and high spatial resolution (up to 10 µm). In order to make the IP an absolute ion flux detector, different types of IPs have been absolutely calibrated for several ion species (e.g., protons 12 , deuterium 13 , carbon 14 , titanium 15 , and silver and xenon ions 16 ) by using laser-driven ion beams. In light of the emerging acceleration mechanisms that can accelerate heavy ions efficiently, it is crucial to calibrate the response of IPs to energetic heavier ions.…”