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. 2023 Jun 11;96(1148):20220560. doi: 10.1259/bjr.20220560

Table 3.

Studies implementing new ionometric approaches for dosimetry of FLASH beams

Ionometric approach Beam & energy Average dose rate Dose-per-pulse Pulse duration Uncertainty (k = 1) Reference
PTW Advanced Markus (new ksat correction approach) 7 MeV electron beams 125 Gy/s 0.5 Gy 1–4 µs 5 % 55
Ultra-thin chamber Electron beams at:

  1. 9 MeV

  2. 20 MeV

  1. up to 120 Gy/s

  2. up to 27 Gy/s

  1. up to 12 Gy/pulse

  2. up to 5.4 Gy/pulse

  1. 4 µs

  2. 2.5 µs

 Not stated 56
Variable low pressure noble gas chamber* 7 MeV electron beams up to 10 kGy/s up to 40 Gy/pulse 4 µs Not stated 57
a

*Only theoretical studies, tests in progress.