Booster main magnet power supply, present operation and potential future upgrades

The Brookhaven Booster Main Magnet Power Supply (MMPS) is a 24 pulse thyristor control supply, rated at 5500 Amps, +/-2000 Volts, or 3000 Amps, +/-6000 Volts. The power supply is fed directly from the power utility and the peak magnet power is 18 MWatts. This peak power is seen directly at the incoming ac line. This power supply has been in operation for the last 18 years. This paper will describe the present topology and operation of the power supply, the feedback control system and the different modes of operation of the power supply. Since the power supply has been in operation for the last 18 years, upgrading this power supply is essential. A new power supply topology has been studied where energy is stored in capacitor banks. DC to DC converters are used to convert the dc voltage stored in the capacitor banks to pulsed DC voltage into the magnet load. This enables the average incoming power from the ac line to be constant while the peak magnet power is pulsed to +/- 18 MWatts. Simulations and waveforms of this power supply will be presented

Commissioning of the new AGS MMPS transformers

The Brookhaven AGS Main Magnet Power Supply (MMPS) is a thyristor control supply rated at 5500 Amps. +/-9000 Volts. The peak magnet power is 50 MWatts. The power supply is fed from a motor/generator manufactured by Siemens. During rectify and invert operation the P Bank power supplies are used. During the flattops the F Bank power supplies are used. The P Bank power supplies are fed from two 23 MVA transformers and the F Bank power supplies are fed from two 5.3 MYA transformers. The fundamental frequency of the F Bank power supplies is 1440 Hz, however the fundamental frequency of the P banks was 720 Hz. It was very important to reduce the ripple during rectify to improve polarized proton operations. For this reason and also because the original transformers were 45 years old we replaced these transformers with new ones and we made the fundamental frequency of both P and F banks 1440 Hz. This paper will highlight the major hurdles that were involved during the installation of the new transformers. It will present waveforms while running at different power levels up to 6MW full load. It will show the transition from the F-Bank power supplies to the P-Banks and also show the improvements in ripple made on the P-Bank power supplies

Interaktywne gry programu Vensim jako wsparcie procesu uczenia się w dynamice systemowej

This article presents the process of learning with the use of interactive gaming described on “Accidental Adversaries” archetype model, thus providing a new method of research than can be conducted on vast number of SD models. Authors selected an already well researched archetype to show a different approach in the process of model optimization. This gives the opportunity to share the knowledge about the possibilities of practical application of interactive gaming.W artykule opisano proces uczenia się z wykorzystaniem interaktywnych gier przedstawiony na archetypie „Przypadkowi przeciwnicy”, pokazując w ten sposób nową metodę badania, która może być zastosowana w ogromnej liczbie modeli dynamiki systemowej. Autorzy wybrali dokładnie zbadany i opisany w literaturze archetyp, aby zilustrować nowe podejście do procesu optymalizacji modelu. Przykład prezentuje nowe możliwości praktycznego zastosowania interaktywnych gier symulacyjnych

High power fast ramping power supplies

Hundred megawatt level fast ramping power converters to drive proton and heavy ion machines are under research and development at accelerator facilities in the world. This is a leading edge technology. There are several topologies to achieve this power level. Their advantages and related issues will be discussed

The main magnet power supply of the ion rapid cycling medical synchrotron

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