ក្រុមរូបវិទ្យាថ្នាក់ទី 11 បាននិងកំពុងប្រើប្រាស់ឧបករណ៍ថ្មីបំផុតរបស់យើង - បំពង់ធ្នឹមពីរ - ដើម្បីវាស់បន្ទុកទៅសមាមាត្រម៉ាស់ (q/m) នៃអេឡិចត្រុង។ អេឡិចត្រុងគឺ accelerated to a velocity of up to ten million metres per second, before being bent into a circular path by a magnetic field. By measuring the diameter of the circle and the current in the field coils, q/m can be determined. The path of two electron beams can be seen as orange lines in the tube, caused by the electrons striking neon atoms present at low pressure.