ch 1: jet_E1
ch 2: jet_E2
ch 3: jet_E3
ch 4: jet_E4
ch 5: jet_S1
ch 6: jet_S2
ch 7: jet_S3
ch 8: jet_S4
ch 9: jet_WWK
ch 10: jet_VV1
ch 11: jet_VV2
ch 12: jet_P0
ch 13: jet_T1
ch 14: jet_T2
ch 15: ring_RF
ch 16: Schottky_span0
ch 17: HV_cooler
ch 18: collector_current
ch 19: inhibit