The new MRD series vacuum rotary feedthroughs from Thermo Vacuum Generators feature a high torque and a magnet coupling of the rotary motion from atmosphere into vacuum through a static metal barrier, and bakeable to 250°C. The rare-earth magnetic design allows high-breakaway-torque loads of up to 5 Nm, enough for substrate rotation mechanisms, choppers, shutters, turrets, and rotary tables. The MRD series can be used for repeatable positioning and exact rotational speed control (at speeds up to 1000 rpm). In case of excess torque, the coupling safely slips without damaging the feed-through. The company offers 18 models including manual, pneumatic rotary actuator, DC motorized, DC stepper motor, and standard UHV types, all available with various Conflat or KF flange mountings. Thermo Vacuum Generators, 355 River Oaks Parkway, San Jose, California 95134,

Circle number 181 on Reader Service Card

MKS Instruments has announced the HPS Products series 909 Mini Ion Transducer, a Bayard–Alpert-style hot-cathode ionization gauge sensor and electronics controller integrated into one package. The sensor has two yttria-coated iridium filaments that are resistant to damage caused by high oxygen partial pressures and accidental exposure to atmosphere. The tube, which operates accurately at lower than usual temperatures, gives a lower chemical reaction rate and minimizes thermal interference; it is bakeable to 300°C. The transducer includes an electron bombardment degas function that is set through an RS485 port and is pressure controlled so that the transducer will automatically stop and restart at preset pressures. The vacuum can be measured during degas. The 909 offers a semi-logarithmic analog output and a relay set point. MKS Instruments Inc, HPS Products Group, 5330 Sterling Drive, Boulder, Colorado 80301,

Circle number 182 on Reader Service Card

Extorr has introduced the XT, a vacuum measurement probe that incorporates a residual gas analyzer, a Bayard-Alpert ionization gauge, and a Pirani gauge into one package. The RGA, a quadrupole mass analyzer, includes a Faraday cup detector having a sensitivity that allows partial pressure measurements from 10−4 to 10−11 torr, a dynamic range that enables measurements of small and large gas pressures simultaneously. Three models of the XT are available, with mass ranges of 1–100, 1–200, and 1–300 amu and a resolution greater than 0.5 amu (at 10% peak height). The Pirani gauge measures start-up pressures and regulates the start-up of the ion gauge, which in turn regulates the start-up of the RGA. The XT’s software allows for complete RGA head control with mass scale tuning, sensitivity calibration, and ionizer setup. Extorr Inc, 307 Columbia Road, New Kensington, Pennsylvania 15068,

Circle number 183 on Reader Service Card

Vacuubrand has released the model MD-4 VARIO-SP, a compact, three-stage, variable speed (350–2200 rpm), oil-free mechanical pump incorporating precision-guided flat diaphragms for high performance at low pressures. The diaphragm and valve lifetimes are greater than 10 000 hours at 1500 rpm, and even longer lifetimes are typical at reduced speeds. With a pumping speed of 63 L/min and an ultimate vacuum of 0.75 torr, the MD-4 VARIO-SP provides powerful backing of modern wide-range turbo pumps. The speed of the electronically controlled brushless 24-V DC motor can be preset or controlled by an external signal, either pulse width modulation or 0 to 10-V analog. The SP-version of the pump is designed for integration by an OEM into vacuum systems. Also available are chemical-resistant models and 115/230 V versions. Vacuubrand Inc, 107 Commerce Road, Cedar Grove, New Jersey 07009–1207,

Circle number 184 on Reader Service Card

The VFT vacuum feedthrough from Ocean Optics is a fiber-optic device for channeling light into or out of a vacuum chamber. The device incorporates a novel metal-to-glass seal applied to an optical fiber that couples light between internal and external SMA 905 connectors. The VFT, which is tested and certified to 10−9 torr, is ideal for applications involving environmental testing, pharmaceutical processing, and optical coatings production. It can also be used in molecular beam epitaxy, chemical and physical vapor deposition, and as a penetrator for NEMA enclosures, glove boxes, and moderate pressure installations. The VFT is available in optical fiber diameters of 200, 400, 600, and 1000 µm. Ocean Optics Inc, 380 Main Street, Dunedin, Florida 34698,

Circle number 185 on Reader Service Card

Pfeiffer Vacuum has announced the HiMag 2400 Maglev turbo pump, said to be the first magnetically levitated turbo pump with an integrated controller. The pump features a high pumping speed (2100 L/s for nitrogen), high compression for light gases (104 for hydrogen), and high heavy-gas throughput (2500 scc/m for argon). It also has a high foreline tolerance (3 mbar for N2). The HiMag 2400’s advanced rotor design creates a low moment of inertia—resulting in low forces during a crash—and its advanced magnetic suspension system reduces vibration and noise levels. The turbo pump can be vented to a full stop within 1.5 min; an integrated brake allows stopping without venting within 5 min; and its 1200-W motor brings the pump up to 100% of speed within 6 min. Pfeiffer Vacuum Inc, 568 Gibraltar Drive, Milpitas, California 95035,

Circle number 186 on Reader Service Card

The LTT-h from Cambridge Magnetic Refrigeration is an impedance matching transformer that operates at cryogenic temperatures and extends the high frequency range of the company’s earlier models. Greater control of the parasitic secondary capacitance and the leakage inductance in the new transformer have yielded high-frequency operation from 100 kHz to more than 1 MHz and have minimized high-frequency resonances. Although the frequency response will depend on the source impedance and transformer gain, that response is approximately the same for settings with the same matched output impedance. The extended frequency range and low (10 µH) input inductance of the LTT-h makes it useful for bolometry or SQUID coupling. Four models of the LTT-h provide turns ratios of 1:10, 1:30, 1:100, and 1:300. Cambridge Magnetic Refrigeration Ltd, 55 Richmond Road, Cambridge CB5 8DN, UK,

Circle number 187 on Reader Service Card

Lake Shore Cryotronics has introduced the CX-1010, a Cernox resistance temperature detector (RTD) designed to operate to temperatures as low as 100 mK. At that temperature, the typical resistance of the CX-1010 is 20 kΩ with a sensitivity of −800kΩ/K and a dimensionless sensitivity of −3. Those parameters provide for a resolution of better than 10 µK when used with the company’s model 370 AC resistance bridge. Cernox RTDs are zirconium oxynitride thin-film sensors with fast thermal-response times and high resistance to ionizing radiation. With the extension to the 100-mK region, the CX-1010 can be used as a replacement for germanium RTDs, but unlike the Ge devices, is usable to room temperature and exhibits low magnetic field-induced errors. Lake Shore Cryotronics Inc, 575 McCorkle Boulevard, Westerville, Ohio 43082,

Circle number 188 on Reader Service Card

Janis Research has developed the JDR-150 helium-3/helium-4 dilution refrigerator with a guaranteed base temperature of 15 mK (10 mK has been achieved). With a cooling power of 150 µW at 100 mK, the refrigerator includes a complete set of thermometers and heaters to monitor and control the temperature of the various stages of the cryostat between room temperature and 15 mK. The system is designed with a sample in vacuum, a silver-powder-loaded heat exchanger, a sealed rotary vane pump, and an overflow protection system. The JDR-150 can be provided with calibrated resistive and CMN paramagnetic thermometers, and their readout instruments, and with options such as sliding seals, a UHV-compatible version, and side access tubes from room temperature to the inner vacuum chamber. Janis Research Company Inc, 2 Jewel Drive, P.O. Box 696, Wilmington, Massachusetts 01887–0696,

Circle number 189 on Reader Service Card

Hart Scientific’s Deep-Well Compact Baths are constant-temperature fluid baths for calibration of a variety of temperature sensors. Four baths in this series cover temperatures from −80°C to 300°C and offer stabilities over that range from ±0.005°C to ±0.015°C; uniformities are as good as ±0.007°C. The baths provide 18 inches of depth to accommodate liquid-in-glass and other long-stem thermometers such as standard platinum resistance thermometers. Despite their small volume of fluid (4.2 gal), the baths can be used to calibrate thermometers in batches of 10 or more. The baths come with a drain for easy fluid removal and an overflow reservoir to capture excess fluid that results when fluids expand with increasing temperature. The baths are compatible with the company’s MET/TEMP II software. Hart Scientific, 799 East Utah Valley Drive, American Fork, Utah 84003–9775,

Circle number 190 on Reader Service Card

American Magnetics is now offering a standard three-axis superconducting magnet system that provides a way to rotate the magnetic field vector on the three principal axes using the company’s model 420 power supply controller in combination with its four-quadrant power supply and a National Instruments LabVIEW program. The company’s virtual interface allows a user to enter, on a computer screen, the desired field vector of a three-axis magnet in Cartesian, cylindrical, or spherical coordinates. Typical specifications are a magnetic field of up to 8 T for the principal axis, two-inch vertical clear bore, and a 1-T rotatable vector using any combination of x, y, and z magnets. The sample under investigation may be at any variable temperature between 0.3 and 300 K. American Magnetics Inc, 112 Flint Road, P.O. Box 2509, Oak Ridge, Tennessee 37831–2509,

Circle number 191 on Reader Service Card

Nanofast has issued a product release entitled “Observations on the Destruction of Electronic Equipment by Lightning and Other Electric and Magnetic Events.” The information is based on the company’s experience repairing equipment damaged by direct and nearby lightning, electrostatic discharges, and voltages and currents induced by changing magnetic and electric fields within loops and lengths of conductive materials. The product release describes the deleterious effects on metal-film and carbon composition resistors, relays, FETs and other transistors, and CMOS devices. The company’s 200-V pulse generator, the P200, has proven useful in determining the power and energy levels necessary to destroy such devices and components. Also recommended for those studies is the P601 Voltage Probe. Nanofast Inc, 416 West Erie Street, Chicago, Illinois 60610

Circle number 192 on Reader Service Card

Ricor Cryogenic and Vacuum Systems has released an enhanced version of its MicroStar HC that delivers 15 W of cooling power at 120 K, thus increasing cooling capacity by 30%. The MicroStar HC, a Stirling cycle cryo pump, is self-contained and requires no external helium compressor, hoses, or other electronic modules. Regeneration is accomplished by an integrated controller, which alters the frequency of the pump’s expander and changes the thermodynamics from cooling to heating. The company’s Stirling cycle cooling technology enables the MicroStar HC to reduce water vapor partial pressure, base pressure, and pump down time. The resulting faster product throughput is valuable in harsh semiconductor applications such as etch and chemical vapor deposition. Ricor Cryogenic and Vacuum Systems, 5779 Herma Street, San Jose, California 95123, http://www.ricor com

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LabSmith has introduced the HVS448 High Voltage Sequencer for precise control of MEMS and microfluidics experiments. The instrument provides eight channels that can automatically switch among three functional modes: regulated high-voltage output (up to ±3000 V with 0.002% regulation); regulated current output (up to ±100 mA with 0.002% regulation); and 100-MΩ inputs, each with 16-bit current and voltage sensing. Channels communicate internally via flags, triggers, and other means to control and automate complex experimental setups. Hierarchical Sequence software provides full control over all channel functions and includes wizards for quickly setting up basic sequences. The HVS448 includes National Instruments LabVIEW drivers to ensure easy integration with other laboratory equipment, LabSmith Inc, 1159 Rebecca Drive, Livermore, California 94550,

Circle number 194 on Reader Service Card

Stanford Research Systems (SRS) has introduced the IGC100 Web-enabled ion gauge controller to operate Bayard-Alpert ionization gauges, convection-enhanced Pirani gauges, and capacitance manometers over the pressure range from UHV up to 1000 torr. SRS offers the IGC200 LabVIEW Development Kit, consisting of a complete set of National Instruments drivers, that, together with the LabVIEW graphical programming platform, enable users to develop customized vacuum measurement and control applications for the IGC100. For example, a user could allow data acquisition, display, and correlation of the data from multiple devices such as total pressure gauges, mass flow controllers, pump controllers, thermocouple readouts, and so on. Stanford Research Systems Inc, 1290-D Reamwood Avenue, Sunnyvale, California 94089,

Circle number 195 on Reader Service Card