What's New at NEC

Welcome to the NEC website

May 2004 - September 2005

The demand for electrostatic accelerators continues to be very high. Since our last update 14 months ago, NEC has sold an additional 10 complete ion beam systems. AMS applications dominate with 2/3 of these machines for radioisotope measurement. In addition, at the same time, 7 new Pelletron accelerators have been shipped and the installation of the 7th is still underway with the earlier 6 all accepted on-site.

AMS Systems

In the last 14 months, 4 new AMS systems have gone into operation. Two are carbon only systems for private companies in Japan. A highly versatile system based on our 3 MeV tandem Pelletron is presently in operation at the Seconda Universita degli Studi di Napoli, Dipartimento di Scienze Ambientali. This system is equipped with bending magnets sufficient for a thorough investigation of the radio isotope ratios though the actinide region. In addition, Peking University has accepted and has in operation a 500 kV tandem Pelletron AMS system for carbon only.

The second of our Single Stage AMS Systems is presently undergoing installation at GlaxoSmithKline in the UK. This machine will be used entirely for biomedical applications. Another of these systems for GSK is expected to be shipped later this month. Two additional of the single stage AMS systems are presently in manufacture for use at the Scottish Universities Environmental Research Center and at the Australian National University.

In addition, two more of the 500 kV tandem Pelletron based carbon only AMS systems are presently in manufacture for Accium Bio Sciences in Seattle, Washington and the 14CHRONO lab at Queen's University in Belfast. These systems are to be shipped early this fall and in mid 2006, respectively.

IBA Systems

A complete micro RBS analysis system based on our 1.7 MV tandem Pelletron has gone into operation at the Chemistry Department of Hope College in Holland, Michigan. This is primarily an undergraduate institution where the Pelletron accelerator has been made a part of their undergraduate program. The Hope system is equipped with the NEC electrostatic quadrupole quadruplet in the Model RC43 Analysis End Station. An order for a similar system has recently been received for the Department of Physics, State University of New York at Geneseo.
The Hope College analysis end-station, RC43, has an electrostatic quadrupole quadruplet lens in the collimator position inside the chamber. As with all RC43 end-stations, the target is mounted on a five axis goniometer. Detectors are present for routine channeling RBS and ERD.

One of the more unique systems presently in manufacture at NEC is the model 3UH-4, single-ended 3 MV Pelletron for the Commissariat a L'Energie Atomique in Saclay. This 3MV Pelletron is equipped with a 2.4 meter long high voltage terminal suitable for the Nanogan ECR source (manufactured by Pantechnik in Caen, France). This system is designed to produce a wide range of multiple charged positive ions from the 3 MV terminal. The source will be equipped with adequate pumping and the necessary double shielding for all of the terminal ion source electronics. The system is expected to be shipped late summer, 2006.

Subsystems and Components

In addition to the usual components sales for additions to existing Pelletron systems, NEC sells subsystems to upgrade older van de Graaff accelerators and for new projects. We recently accepted an order from iThemba Labs in Johannesburg, South Africa to convert their EN to the Pelletron charging system. This brings to 7 the number of ENs that have been converted to the Pelletron system. In addition, there are now 11 FNs and seven MPs with Pelletron chains.

Last January NEC shipped a 250 kV Platform for use at the High Power Target Laboratory at the Holifield Radioactive Ion Beam Facility (ORNL). This platform is unique both by its size and weight carrying capability. This 7.3 m by 3.6 m platform has 13 insulator columns to support the approximately 60,000 lbs required for the new radioactive ion beam source and necessary shielding. This platform has now been installed by HRIBF personnel.

A more conventional dual ion source injector was recently ordered by the Centro Atomico Bariloche in Argentina. This injector is equipped with the Source of Negative Ions by Cesium Sputtering (SNICS) and the NEC RF charge exchange ion source for He- production. Almost 90 of the NEC RF charge exchange ion sources have now been sold along with more than 130 of the NEC SNICS sources.

The RF charge exchange source mentioned above routinely produces 2 to 3 A of He-. For higher currents, NEC has developed the high current He- injector based on our Toroidal Volume Ion Source ( TORVIS ) followed by a rubidium vapor charge exchange cell. One of these systems was recently delivered to Ruhr-Universitat Bochum Dynamitron-Tandem-Lab in Bochum, Germany for use on their 4 MV tandem Dynamitron. During factory tests, this system routinely produced 25 to 30 microamps of He- suitable for injection into a tandem accelerator. Another of these injectors is presently in manufacture for the Livermore National Laboratory for use on their FN.
The TORVIS source, extractor gap lens assembly and rubidium charge exchange cell are mounted on a 60 kV platform. During factory tests, this injector routinely produced 25 to 30 microamps of He-.

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Last revised April 17, 2007 by Stephanie Kerber, nec@pelletron.com
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