Place: KVI-CART, Zernikelaan 25, 9747AA Groningen, The Netherlands

Duration: 3 days

Maximum participants: 4


The training workshop will address two topics related to low-energy beam transport. The first one covers the design of low-energy beam transport lines, both theoretically and practically. Important concepts such as phase space,  beam emittance and space-charge forces will be introduced. The participants will get hands-on experience with simulation tools used for beam-transport design. The second topic is concerned with measuring beam emittances. After giving a brief overview of emittance measuring methods, we will focus on the one used at KVI, i.e. the pepperpot method. Participants will get hands-on experience with this device and study how the beam emittance depends on the tuning of the ion source and the optical elements in the beam-transport line.

Plan of activities

First day: The participants will attend an introduction seminar on the objectives of the training followed by an introduction to the theory of beam transport and the use of simulation software. They will then use the simulation  software to design a low-energy beam transfer line between an ECR ion source and a cyclotron.

Second day: The workshop will start with a seminar on beam emittances and devices to measure them. The rest of the day will be devoted to practical training including operating the KVI-AECR ion source and beam transport line. The pepperpot emittance meter will be discussed in detail, both its construction, operation and reconstruction of the 4d phase space from the measurements.

Third day: The last day is entirely devoted to hands-on training. The participants will use the KVI-AECR ion source to produce an ion beam, tune the low-energy beam line and measure the beam emittance with the pepperpot emittance meter. They will perform a series of measurements to investigate the effect of different ECRIS parameters, e.g. the gas pressure and injected RF power, and the tuning of the beam transport line on the beam emittance. The workshop ends with an evaluation and feedback session.

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