Evaluation of hydrogen gas flow system in DECY - 13 cyclotron

Abstract

The Center for Accelerator Science and Technology (CAST – BATAN) is developing a cyclotron that eventually will be used for radioisotope production. The cyclotron accelerates charged particles (?−) generated by ion source through circular trajectories up to the desired energy and form proton beams through an extraction system. In the early operational stage, the beam current strongly influenced by the flow speed of hydrogen gas in the head of an ion source, therefore the gas flow performance needs to be characterized. Evaluation have been undertaken which cover component identification, data collection and analysis of the obtained data. The operational data of the opening gas valve is represented by the voltage and flow rate. This evaluation results can be used as a basis or guidance for further construction of the ion source instrumentation control system.

Desain Konseptual Internet Accelerator Laboratory (IAL) untuk Siklotron DECY-13

“…The main components of the DECY-13 cyclotron consist of seven main components and two supporting components. The main components are the ion source system [14], [15], the magnetic system [16], [17], the vacuum system, the radio frequency generator (RF) system, the speeding RF system, the beam measuring system, and the extractor system. Meanwhile, the two supporting components consist of an instrumentation and control system (ICS) [18], as well as a utility system (electricity and cooling).…”

Perancangan Dan Identifikasi Kendali Pid Pada Aliran Hidrogen Sumber Ion Siklotron Decy 13

“…ITAE merupakan penambahan pengali waktu pada IAE, sehingga akan lebih mempercepat respon dalam mereduksi error. Percobaan pertama dilakukan pada saat bejana berada pada kondisi vakum seperti pada eksperimen yang dilakukan pada penelitian sebelumnya [17]. Gas dimasukkan dengan input step dan diamati waktunya (respon waktu) dari nilai 0 sampai mencapai input yang diberikan.…”

“…Banyaknya aliran gas yang diberikan untuk pembuatan model 3 sccm dengan masingmasing sebanyak 5 kali percobaan dan menghasilkan hasil yang hampir sama. Eksperimen dilakukan pada saat tingkat kevakuman 10 -3 Torr (vakum rendah) dan 10 -5 Torr (vakum tinggi) [17]. Input gas diberikan berupa sinyal step dan output diukur dengan alat ukur aliran gas (mass flow meter) dengan satuan sccm (cm 3 /min).…”

Integration of monitoring and operation ion source system in the DECY-13 cyclotron

“…It's essential to mention that the gas flow system has not been physically installed on the cyclotron as of yet. Therefore, subsequent tests will be conducted to evaluate its functionality based on ion source operation with a gas input rate of 5-6 SmL/min [11].…”