Pengembangan Sistem Instrumentasi Akselerator Berbasis EPICS (Experimental Physics and Industrial Control System)

Taxwim, Dr.-Ing. Awang Noor Indra Wardana; Dr. Taufik

2025 | Tesis | MAGISTER TEKNIK FISIKA

Experimental Physics and Industrial Control System (EPICS) adalah framework sumber terbuka untuk membangun sistem monitoring terdistribusi berbasis jaringan (Distributed Control System, DCS), yang telah banyak digunakan di fasilitas akselerator di seluruh dunia. Studi ini mengimplementasikan EPICS di Laboratorium Akselerator PRTA-BRIN untuk memfasilitasi pemantauan data serta mendukung operasi dan keamanan berbasis jaringan. Penelitian ini dimulai dengan menginstal EPICS menggunakan Linux Ubuntu pada komputer server berbasis Raspberry Pi, yang berperan sebagai Input Output Controller (IOC). Data dari perangkat sistem vakum diproses di server dan ditampilkan pada komputer klien melalui jaringan menggunakan protokol Channel Access.  Karena fasilitas Linear Accelerator (LINAC) masih dalam tahap perencanaan, maka uji coba dilakukan pada sistem vakum Siklotron DECY-13 yang memiliki karakteristik serupa. Sistem vakum DECY-13 dikendalikan oleh PLC, Cerio, dan vacuum gauge controller TPG-300. Program EPICS dikembangkan untuk membaca data tekanan vakum dari TPG-300 melalui jaringan, kemudian diuji menggunakan Wireshark untuk mengukur round-trip time (RTT), Throughput, dan Packet Loss. Hasil pengujian menunjukkan RTT antara 0,045–0,15 ms, throughput 50–55 bit/s, dan packet loss 1,8%. Nilai-nilai ini memenuhi standar kinerja komunikasi untuk sistem kendali akselerator. Program EPICS yang selesai dibuat tersebut diuji-cobakan pada Siklotron CS-30 Serpong. Studi ini membuktikan efektivitas EPICS dalam integrasi sistem vakum akselerator dan berpotensi menjadi acuan pengembangan sistem monitoring vakum di laboratorium akselerator lainnya, terutama pada perencanaan laboratorium PRTA-ORTN-BRIN.

The Experimental Physics and Industrial Control System (EPICS) is an open-source framework for developing network-based distributed control systems (DCSs) that has been widely adopted by accelerator facilities around the world. This study implements EPICS at the PRTA-BRIN Accelerator Laboratory to enable real-time data monitoring and support network-based operational and safety systems. This research began with installing EPICS using Linux Ubuntu on a Raspberry Pi-based server computer., which serves as the input/output controller (IOC). The server processes data from vacuum devices and displays it on a client computer via the network using the Channel Access Protocol. Since the Linear Accelerator (LINAC) facility is still in the planning stage, experimental work was carried out on the DECY-13 cyclotron's vacuum system, as it exhibits similar operational characteristics. Currently, the DECY-13 vacuum system is controlled by a PLC, a Cerio, and a TPG-300 vacuum gauge controller. An EPICS application was developed to retrieve vacuum data from the TPG-300 over the network. Network performance was evaluated using Wireshark to measure round-trip time (RTT), throughput, and packet loss. The results showed RTT values between 0.045 and 0.15 milliseconds, stable throughput of 50–55 bits per second, and a packet loss rate of 1.8%. These values align with communication performance standards for accelerator control systems. The completed EPICS program was tested on the CS-30 Serpong Cyclotron. This study demonstrates the effectiveness of EPICS in integrating accelerator vacuum systems, and it could serve as a model for developing low-cost control systems in other accelerator laboratories, particularly for the PRTA-ORTN-BRIN laboratory.

Kata Kunci : Keywords: Accelerator, EPICS, communications analysis, Wireshark