Design and implementation of new control room system in Damavand tokamak

Abstract

The aim of this paper is design and implementation of an up-to-date control room. The previous control room had a lot of constraints and it was not apposite to the sophisticated diagnostic systems as well as to the modern control and multivariable systems. Although it provided the best output for the considered experiments and implementing offline algorithms among all similar plants, it needed to be developed to provide more capability for complex algorithm mechanisms and this work introduces our efforts in this area. Accordingly, four leading systems were designed and implemented, including real-time control system, online Data Acquisition System (DAS), offline DAS, monitoring and data transmission system.In the control system, three real-time control modules were established based on Digital Signal Processor (DSP). Thanks to them, implementation of the classic and linear and nonlinear intelligent controllers was possible to control the plasma position and its elongation. Also, online DAS was constructed in two modules. Using them, voltages and currents of charge for the capacitor banks and pressure of different parts in vacuum vessel were measured and monitored. Likewise, by realtime processing of the online data, the safety protocol of plant performance was accomplished. In addition, the offline DAS was organized in 13 modules based on Field Programmable Gate Array (FPGA). This system can be used for gathering all diagnostic, control, and performance data in 156 channels. Data transmission system and storing mechanism in the server was provided by data transmitting network and MDSplus standard protocol. Moreover, monitoring software was designed so that it could display the required plots for physical analyses. Taking everything into account, this new platform can improve the quality and quantity of research activities in plasma physics for Damavand tokamak.

The mass of a dark matter WIMP derived from the Hubble constant conflict

“…It is worth considering whether the various WIMP detector systems around the world, including LUX in South Dakota, USA (Akerib et al 2016), Xenon100, Darkside50 and XENON-1T at Gran Sasso in Italy (Aprile et al 2019), Boulby Potash Mine in Yorkshire run by Sheffield University in the UK (Battat et al 2015) and XMASS in Kamioka, Japan (XMASS Collaboration et al 2018), will have seen anything. The detectors use liquid xenon and liquid argon.…”

“…Our descriptions are limited to describing the matter as due to particles that only feel the gravitational force and are probably weakly interacting massive particles or WIMPs. The search for dark matter has over many years not produced a positive result both from operating the CERN Large Hadron Collider (Drees et al 2001), or looking for the signature of WIMP interactions (Archambault et al 2012), with a comprehensive review by Vasiliki A Mitsou (Mitsou 2015) and numerous searches hunting for interactions of dark matter particles locally, typically applying a range of detectors, like the Japanese XMASS detector (XMASS Collaboration et al 2018), the Italian XENON programme (Aprile et al 2019), the United States LUX experiment in the Homestake Mine in South Dakota (Akerib et al 2016), or the UK programme from the University of Sheffield centred on the Boulby mine in Yorkshire (Battat et al 2015).…”