Time-of-Flight study of molecular beams extracted from the ISOLDE RFQ cooler and buncher

Abstract

Molecular beams injected into the ISOLDE Radio-Frequency adrupole cooler and buncher (RFQcb), ISCOOL, have been studied under varying conditions using a new Time-of-Flight (ToF) detector. When a beam of molecules is injected into the RFQcb and interacts with the bu er gas, collisional dissociation processes may occur. In this study, two di erent beams of molecules, CO + and N + 2 , were separately injected into ISCOOL, and two di erent bu er gases (pure helium or a 90:10 mixture of helium and neon) were used. e radio-frequency of the RFQcb was varied as the molecules, along with the fragments from the dissociation processes, were extracted from ISCOOL and studied using the new Time-of-Flight detector. e main nding of this work is that the rates for molecular dissociation within ISCOOL were very small for both CO + and N + 2 , with the largest rates found for CO + .

Production of intense mass separated 11C beams for PET-aided hadron therapy

“…The highlighted part shows the production system discussed in this paper. The beam cooling [9] and charge breeding [10] are further research projects within MEDICIS-Promed. The different parts are not to scale.…”