title: An integrated wire harp and readout electronics inside vacuum.
abstract: A wire harp is a well known instrument used in ion beam profile measurement and beam diagnostics. Till date, for beam instrumentation, the harp is placed inside the vacuum chamber or beam line in direct exposure to the beam profile to be measured, whereas the related readout electronics is placed outside somewhere at a convenient place. Here, a harp has been developed along with the readout electronics as an integrated part of it and both were placed inside the beam line vacuum (order of 10(-7) Torr) to make the system much simpler, easy to operate, and measure small beam current more accurately. The entire signal conversion and processing is done inside the vacuum unlike other systems; hence, the electronics is kept inside. This results in a lesser number (only 4 pin) of electrical connections (feedthrough) including power which otherwise would have required 32 feedthrough pins only for signal readout for a 13 × 13 (X × Y) channel harp. This paper describes a completely new approach to the design of a conventional beam harp widely used for beam instrumentation.
authors.affiliation: Department of Atomic Energy, Variable Energy Cyclotron Centre, 1/AF.Bidhannagar, Kolkata, India.
authors.forename: Mou
authors.initials: M
authors.lastname: Chatterjee
authors.affiliation: Department of Atomic Energy, Variable Energy Cyclotron Centre, 1/AF.Bidhannagar, Kolkata, India.
authors.forename: P Y
authors.initials: PY
authors.lastname: Nabhiraj