15th Topical Conference on High Temperature Plasma Diagnostics, 19 a 22 de Abril de 2004, San Diego, USA

	Upgrade to the Control System of the Reflectometry Diagnostics of ASDEX Upgrade
	S. Graça, J.Santos e a Equipa de Reflectometria do CFN
	Resumo
	The broadband reflectometer of ASDEX Upgrade is a complex system including VME and CAMAC acquisition/timing systems. Microprocessor input/output boards are used to control and monitor the microwave circuitry and associated electronic devices. The implementation of the control system is based in an object-oriented client/server model: a centralized server manages the hardware and receives input from remote clients. Communication is handled through TCP/IP sockets. Here we describe recent upgrades of the control system to accommodate new channels; to adapt to the heterogeneity of computing platforms and operating systems and to overcome remote access restrictions. Platform and operating system independence was achieved by redesigning the graphical user interface using JAVA. As secure shell is the standard remote access protocol adopted in major fusion laboratories, secure shell tunneling was implemented to allow the remote operation of the diagnostic through the existing firewalls.