| Paper | Title | Page |
|---|---|---|
WEPPC023 |
Bypass Modules for Solenoid Shunting of 2MeV Electron Cooler for COSY | |
|
||
| Beam focusing correction of electron cooler for COSY is realized with a partial current intake from solenoid's winding using special shunts. Maximal shunting current is 20 A with a voltage drop on solenoid's coil in a range of 15-30 V. The dispersion of shunting current is 100 ppm for 10 hour operation. Energy taken from solenoid's winding recuperates to 100-240 VAC, 50/60 Hz line. | ||
| WEPPC027 | Correcting Magnet Power Supplies for the NSLS-II Booster | 500 |
|
||
| Budkers Institute of Nuclear physics builds booster for syncrotron light source NSLS-II. Booster should accelerate electrons from energy 200 MeV to energy 3 GeV, acceleration phase duration is 250 ms, repetition rate – up to 2 Hz. Booster magnet system includes 16 sextuples and 36 dipole correcting magnets powered separately. Forth-quadratant current sources for sextuples and correcting magnets have maximum output current ±6 А, maximum output voltage ±100 V, maximim output current ripples and long-term stability are better than 0,1% relative to 6 A. In ramping mode with current slew rate up to 200 A/s time lag between setpoint and output current is not more than 1msec and can be compensated by software. Results of power supplies system tests and commissioning will be presented in paper. | ||
| WEPPC028 | High Voltage Terminal in COSY Electron Cooler | 503 |
|
||
| In Budker INP SBRAS was developed electron cooler with energy up to 2MeV for COSY accelerator (Germany). Due to restricted footprint, cooler's collector and gun parts were combined in a single acceleration system – high voltage terminal. All power and control electronics were placed in a single isolated volume, filled with SF6 gas under 4-6 atm. pressure. Electronics is controlled via wireless CAN, and powered by multistage transformer, capable of 15 kW power at 26 kHz. Wireless control is passed through dedicated optically transparent window, also served for modulated laser beam, used in electron beam diagnostic. By construction, electronics is divided on two standalone units: collector power supply and gun-filter system (SGF). SGF is built on 19" EuroPak chassis, where were placed all power modules, needed for collector and gun pipe electrodes. All power outputs were protected against overvoltage and sparks, available while cooler exploitation. In SGF there were controlled up to 40 parameters altogether. SGF inner power supply provides stable operation in wide range of input voltage, up to ±50% from nominal. Also included in SGF are 2 auxiliary systems, used for beam guiding and beam diagnostics. | ||
| WEPPC030 | High-Voltage Source with Output Voltage up to 110 kV with Output Current up to 100 mA | 506 |
|
||
| The presented report contains the description of high-voltage source with output voltage up to 110 kV and output current up to 100 A. The source consist of the chopper with IGBT switches working with a principle of pulse-width modulation and the full H-bridge converter with IGBT switches, both working on programmed from 15 to 25 kHz frequency, and the high voltage transformer powering the four-stage multiplier with the additional capacity filter at output. The transformer and multiplier both is made in oil tank with silicon oil. The additional capacity filter provides low ripple and noise level in working range of output currents. A nominal output voltage of the source is 110 kV. The source can operate in normal mode with series of high-voltage breakdown in output voltage. In the high-voltage breakdown the released in load and matching circuit energy is less than 20 J at maximum operating voltage 120kV. The efficiency of system is more than 80% at the nominally output power 11 kW. The controller of the source is developed with DSP and PLM, which allows optimizing operations of the source. For control of the source serial CAN-interface is used. The description of the source and the test results are presented. | ||
| WEPPC031 | 3-Channel Current Source with Channel Output Current up to 180 A and Output Voltage up to 180 V | 509 |
|
||
| The presented report contains the description of 3-channel current source with channel output current up to 180 A and output voltage. Each channel can be operated and controled independently. The source consists of 2 part. First part is charging source with capasitance bank at output. And the second part is 3 current sources powered by a capacitance bank. The charging source is converter with IGBT switches, working with a principle of pulse-width modulation on programmed from 15 to 25 kHz frequency, with high power rectivier at output. The source output voltage is up to 180 V, peak power is 40 kW and average power is 20 kW. Capacitance bank has 120 kVA storage energy. Second part contains 3 independent current sources with up to 180 A output current each. Each current source consist of H-bridge 2-quadrant convertor with MOSFET switches working on 50 kHz frequency and tho output LC filter. The controllers of the sources is developed with DSP and PLM, which allows optimizing operations of the sources. The controllers are connected by internal control network for more flexibility and efficiency. The description of the source and the test results are presented. | ||
| WEPPC032 | The Power Supply System for the Accelerating Column of the 2 MeV Electron Cooler for COSY | 512 |
|
||
| The electron cooler of a 2 MEV for COSY storage ring FZJ is assembling in BINP. The high energy electron beam produced by the electrostatic accelerating column. The power supply for accelerating column of the electron cooling system consists of 33 distributed by the accelerating potential controlled modules. Each module has precision controlled voltage source 60 kV 1mA, and additional supply for the magnetic system solenoid with a maximal current of 2.5 amperes. All the system controlled through wireless ZIGBEE network. The report presents the structure of the power system, its parameters and the results of tests carried out in BINP. | ||
WEPPD027 |
Stepping Motor Drive Systems for Accelerator Technology | |
|
||
| BINP SB RAS is developing various stepping motor drive devices for many years in accordance with requirements of acceleration and storage facilities. During this time several types of electric drives to control stepping motors with a 2-6 phases were developed. Electric drives are handled by special CANbus controller developed in BINP with smooth stepping motor acceleration and deceleration. Also special program was written to simplify adjustment of positioning system, this program allows operating using PC's Universal Serial Bus. | ||