Fig. 5: In situ calibration of the alpha particle detector with a 241Am alpha particle source.
From: First measurements of p11B fusion in a magnetically confined plasma
a Time history of 241Am calibration data taken in situ showing the fast, mono-energetic, negative pulses. b A histogram of pulse heights, converted to energy using the known energies of the 241Am alpha particles. The energy resolution of the detector σ is 0.43 MeV at 5.486 MeV, better than 10%. The purple lines indicate the relative strengths of the energy components of the source. c An average of 609 pulses from the 241Am alpha particle source digitized at 250 MHz (Techno AP, APV8508). The gray error bars represent the standard deviation of the mean.
