VECC, Kolkata, India
VECC, Kolkata, India
IUAC, New Delhi, India
VECC, Kolkata, India
[1]S.Ghosh et al Phys. Rev. ST Accel. Beams 12, 040101 (2009).
| Paper | Title | Page |
|---|---|---|
| WECOCB02 | ARM Based Embedded EPICS Controller for Beam Diagnostics of Cyclotrons at VECC | 1024 |
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| ARM based controller with embedded EPICS has been developed for beam diagnostics purpose in K-130 Room Temperature Cyclotron and K-500 Superconducting Cyclotron at Variable Energy Cyclotron Center. The beam diagnostics system in these cyclotrons consists of many hardware devices to be controlled and monitored. Presently, these hardware modules are interfaced with PC based systems using serial communication line. The ARM based embedded controller card is developed to replace the existing PC based systems with a small plug-in module that will contain the EPICS IOC and the database having the control parameters. This will have an obvious advantage of integrating the control system inside the hardware itself thus reducing the overall hardware complexities which was involved in the PC based systems. The paper explains the steps involved in designing the ARM based controller for beam diagnostics and Graphical User Interface (GUI) for Operator Interface. EPICS Channel Access embedded ActiveX components along with Microsoft Visual Basic (VB) is chosen as the OPI development platform. | ||
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Slides WECOCB02 [1.428 MB] | |
| THPPC117 | A Control Strategy for Highly Regulated Magnet Power Supplies Using a LQR Approach | 1334 |
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| A linear quadratic regulator (LQR) based proportional-Integrator-derivative (PID) controller is proposed for the SMPS based magnet power supply of the high current proton injector operational at VECC. The state weighting matrices ‘Q’ of the LQR based controller is derived analytically using guaranteed dominant pole placement approach with desired ‘ζ’ (maximum overshoot) and ‘ω’(rise time). The uniqueness of this scheme is that the controller gives the desired closed loop response with minimum control effort, hence avoiding the actuator saturation by utilizing both optimum behavior of LQR technique and simplicity of the conventional PID controller. The controller and power supply parameter perturbations is studied along with the load disturbance to verify the robustness of proposed control mechanism. | ||
| THPPC138 | A System for Automatic Locking of Resonators of Linac at IUAC | 1376 |
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The superconducting LINAC booster of IUAC consists of five cryostats housing a total of 27 Nb quarter wave resonators (QWRs). The QWRs are phase locked against the master oscillator at a frequency of 97 MHz. Cavity frequency tuning is done by a Helium gas based slow tuner. Presently, the frequency tuning and cavity phase locking is done from the control room consoles. To automate the LINAC operation, an automatic phase locking system has been implemented. The slow tuner gas pressure is automatically controlled in response to the frequency error of the cavity. The fast tuner is automatically triggered into phase lock when the frequency is within the lock window. This system has band implemented sucessfully on a few cavities. The system is now being installed for the remaining cavities of the LINAC booster.
[1]S.Ghosh et al Phys. Rev. ST Accel. Beams 12, 040101 (2009). |
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Poster THPPC138 [4.654 MB] | |