- May 18, 2007: GMW introduces new magnetic field sensors products at Sensors Expo
April 28, 2006: Spallation Neutron Source generated its
first neutrons
June 6, 2005:
GMW introduces new Angle Sensor products at the Sensors Expo in Chicago
May 27, 2005:
The AN_360KIT Application Engineering Kit is available for test and evaluation
March 21, 2004:
GMW introduces the Model 5751 HTS Short Solenoid
February 9, 2004:
Oxford Danfysik to build Beamlines for the UK
DIAMOND Synchrotron
January 20, 2004:
The Institute of Physics announce the publication
of 'Hall Effect Devices' by Prof. R. S. Popovic
December 16, 2003:
Danfysik awarded contract for Injector Assembly
September 25, 2002:
Sentron's CSA-1V Current Sensor IC wins a Bronze
Medal at Sensors Expo
September 18,
2002: Danfysik Booster Accelerator commissioned
at CLS
March 29, 2002:
Bergoz beats the competition
May 14, 2001: GMW Customer,
AccSys Technology, announces delivery of PULSAR
(TM) Linac for Rome, Italy
March 21, 2001: NMR Probe
Array for fast magnetic field mapping
March 8, 2001: Danfysik
buys the Synchrotron Beamlines Group of Oxford Instruments
plc
February 1, 2001: Danfysik
announces 400A DC Current Transducer
March 15, 2000:
Danfysik to deliver Booster Accelerator for
CLS
March 15, 2000:
Bergoz completes testing of new FCT
- March 15, 2000: Group3
CNAs chosen for control of SNS H¯ Ion Source
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May 18, 2007: GMW introduces new magnetic field sensors products at Sensors Expo
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At Sensors Expo, June 11-13, 2007 Rosemont, IL, Booth 406, GMW will be showing magnetic field sensors that are particularly suited for non-contact measurement of:
Machine Condition: The Ametes MFS-3A is a high-sensitivity, three-axis, Magnetic Field Sensor with linear analog outputs for Bx, By, and Bz. With a bandwidth if dc to 100kHz, the MFS-3A can be located outside electric motors, generators, transformers, or actuators to monitor the external magnetic field magnitude and or frequency components. These parameters will change with electrical or mechanical loading to give an isolated, non-contact indication of the “machine condition” in a manner analogous to vibration monitoring of rotating machinery.
Electric Current: The Sentron CSA-1V is a high-sensitivity, high-stability, linear Hall-effect IC with magnetic field sensitivity in the plane of the device and frequency response dc to 100kHz. These features enable the CSA-1V to be used as a compact, low cost current sensor, particularly for circuit protection applications. It can be mounted directly over a current trace on a PCB or on the surface of a high current bus bar. GMW offer Engineering Kits to cover full-scale current range from 250mA to 4000A
Ametes CS Current Sensors are available with high-sensitivities of 10V/A, 1V/A, and 0.25V/A. High voltage isolation of 5kV is achieved by mounting the CSA-1V to measure the magnetic field inside a small coil carrying the primary current.
Rotation Angle: With no programming and no calibration requirement the Asahi Kasei EM3241 provides a linear, analog output directly related to the angle of the magnetic field in the plane of the device. High magnetic sensitivity field sensitivity enables the use of small, low-cost permanent magnets for angle sensor or rotation sensing with better than 0.7° angle resolution over a full 360° at rotation speeds well in excess of 200Hz (12000rpm). Very small size (3.6 x 3.0 x 0.95mm) and a low-power sleep mode (<1µA) suggest the EM2341 will enable new portable and wireless applications.
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April 28, 2006: Spallation Neutron Source, located at Oak Ridge National Laboratory, generated its first neutrons.
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One of the largest and most anticipated U.S. science construction projects of the past several decades has passed its most significant performance test. The Department of Energy's Spallation Neutron Source, located at Oak Ridge National Laboratory, generated its first neutrons on April 28, 2006. GMW has supplied SNS with instrumentation including: Group3 Control system and Bergoz Fast Current Transformers for use in the Front-End Systems; Bergoz Fast Current Transformers and Low Level RF analog front end for use in the Linac; Danfysik Magnet Power Supplies for use in the Accumulator Ring; and Danfysik Power Supplies, Danfysik Current Transducers, and Group3 Digital Teslameters for magnet system test.
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| June 6, 2005:
GMW introduced new Angle Sensor products at the Sensors Expo in Chicago |
GMW
introduced new Angle Sensor products at the Sensors Expo
in Chicago, June 6-8, 2005. When paired with the
Sentron 2SA-10 Angle Sensor IC the GMW360A
Sin/Cos to Analog Interpolator IC provides
linear 0.4V to 4.5V and PWM signals proportional
to angle over the 0 to 360degree range. An electrical
"Zero Angle" can be set at any mechanical
position after system assembly.
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| May 27, 2005:
The AN_360KIT Application Engineering Kit is available for test and evaluation |
The AN_360KIT
Application Engineering Kit is available
for test and evaluation. A combination of the 2SA-10 and GMW360A is offered
as the GMW360ASM
Angle Sensor Module. This is a cylindrical
package of 0.5inch diameter by 0.2inch height (12.70
x 5.08mm). A single 5V supply is required with no
other external components.
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| March 21, 2004:
GMW introduces the Model 5751 HTS Short Solenoid |
As an extension to it's Laboratory Electromagnet
product line GMW introduced the Model
5751 HTS Short Solenoid
at the APS (American Physical Society) Meeting
in Los Angeles, California. With a 35mm diameter
by 72mm long, room temperature bore the 5751 generates
controllable magnetic fields between ±1Tesla (+/-10,000Gauss).
This is 5 to 10 times the field readily generated
by a similar size copper coil and is obtained by
using a Coil wound with HTS (High Temperature Superconducting)
wire operated at 50 degK. Priced at $49,000, a complete
5751 System includes the HTS Coil, integral Cryocooler,
Compressor for the Cryocooler, Power Supply including
polarity reverse and all interconnecting Cables.
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| February
9, 2004: Oxford Danfysik to build Beamlines for
the UK DIAMOND Synchrotron |
Oxford
Danfysik have been awarded the contract
for three complete Protein Crystallography Beamlines
for the new DIAMOND synchrotron in the UK. This
contract will include design, building and installation
of all the main components including adaptive bimorph
mirror systems, double crystal monochromators, diagnostics,
other standard beamline hardware and an EPICS control
system. This contract will be installed in summer
2005.
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| January
20, 2004: The Institute of Physics announce the
publication of 'Hall Effect Devices' by Prof. R.
S. Popovic |
| The
Institute of Physics have announced the publication
of Hall Effect Devices by Professor R S Popovic
of the Swiss Institute of Technology (EPFL) Lausanne,
Switzerland. It covers semiconductor physics, operation
and applications of Hall devices, including Field-effect
and Bipolar types. Professor Popovic is the Founder
of Sentron AG, manufacturer of unique Linear
Hall Elements and Integrated Circuits and Linear
Hall Transducers distributed by GMW. Applications
include magnetic field mapping, non-contact position
and electric current sensing. |
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| December
16, 2003: Danfysik awarded contract for Injector
Assembly |
| Danfysik
has been awarded the turnkey contract for the Injector
System of the Australian
Synchrotron Radiation Facility at Monash University.
Included are: the 100MeV Linac, Transfer Line to
the Booster, 3GeV Booster Synchrotron, Transfer
Line to the Storage Ring with Injection Septum Magnets,
Electromagnets, Power Supplies, Beam Diagnostics
and Controls. |
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| September
25, 2002: Sentron's CSA-1V Current Sensor IC wins
a Bronze Medal at Sensors Expo |
| The
CSA-1V
Hall-effect Integrated Circuit won a Bronze
Medal for Sentron at Sensors
Expo in Boston. An Integrated Magnetic flux
Concentrator (IMC) enhances the CSA-1V magnetic
sensitivity to effectively provide lower noise and
offset in a CMOS Hall-effect device. Isolated electric
current measurement from dc to 100kHz with smaller
size, simpler assembly and lower cost than packaged
current transducers is anticipated to lead to applications
for the CSA-1V to power supplies and motor, generator
and power controllers. The CSA-1V is available in
SOIC-8 package or 1.9mm square dice form. |
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| September
18, 2002: Danfysik Booster Accelerator commissioned
at CLS |
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Canadian
Light Source (CLS) announced today that the
2.9GeV Electron Synchrotron "Booster"
Accelerator has been successfully commissioned in
Saskatoon approximately 30 months after the C$8.9M
contract was awarded to Danfysik.
Beam diagnostic instrumentation for the Booster,
including Beam Position Monitors, DC Current Transformer,
pulse Fast Current Transformer and Beam Loss Monitors
was provided to Danfysik by Bergoz
Instrumentation. Danfysik and Bergoz have also
delivered equipment for the CLS Storage Ring scheduled
for completion in 2003 with operations beginning
in 2004. |
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| March
29, 2002: Bergoz beats the competition |
Bergoz
Instrumentation announced today the award by CERN
for 300+ units of their sensitive Fast Current Transformer
(FCT). These high performance FCTs are to be installed
in critical locations on the Large Hadron Collider
(LHC) accelerator as beam diagnostic monitors.
The specifications for the Bergoz FCTs include:
Mechanical
ID = 38mm
OD = 72 mm
H = 17 mm
Turns Ratio
Type 2 = 100:1
Type 3 = 35:1
Risetime = 30 nsec
Bergoz was selected for superior performance especially
for vacuum operations, quality and price.
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GMW
Customer, AccSys Technology, announces delivery
of
PULSAR (TM) Linac for Rome, Italy |
May
14, 2001
Dr Robert Hamm, President and CEO of AccSys
Technology located in Pleasanton, California,
announced
the completed delivery of a Model-7E PULSAR
(TM) Linear Accelerator to Italy. It will be
installed in Rome at the Regina Elena Oncological
Hospital to produce the F-18 radio-isotope for use
in Positron Emission Tomography (PET) medical diagnostic
imaging. In the future the Model-7E will be time-shared
as the injector for a linac to produce high-energy
protons for cancer therapy.
As well as extensive operational testing and the
demonstration of F-18 production, the Model 7E received
the European Union CE Certificate of Compliance
from TUV Rheinland.
To help meet these demanding performance and reliability
requirements combined with an onerous delivery schedule,
AccSys implemented a control system based on Group3
Control fiber-optic isolated modules with LabView
software and GMW engineering support. |
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| NMR
Probe Array for fast magnetic field mapping
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March 21, 2001
The Metrolab MFC Magnetic
Field Camera from GMW Associates is appropriate
for very fast, high accuracy magnetic field mapping
of uniform field magnets as used in Magnetic Resonance
Imaging (MRI), particle accelerator detectors, ion
traps or mass spectrometers.
An MFC system consists of an MFC-3045 Control and
an MFC-3048 Probe Array configured to the end-user's
required geometry. Typically the Array consists
of up to 32 proton NMR Probes arranged in a planar
array on a semicircle or semi-ellipse. Rotation
of the Array about the diameter generates a magnetic
field map on the surface of a sphere or ellipsoid.
Arrays delivered to date have had diameters of 200
to 600mm. Larger Arrays with up to 96 Probes are
possible.
All Probes in the Array are monitored simultaneously
and a field measurement is obtained in about 30msec.
Normally measurements are averaged for about 2 sec.
Then the Probe Array is moved to the next measurement
position. A complete map of about 960 points (32
Probes x 30 positions) with about 0.3ppm field resolution
can be obtained in less than two minutes.
Recently a new "flat coil" Probe with integrated
rf amplifier has been introduced. This has resulted
in improved tracking between Probes and an extension
to higher fields. Probe Arrays for 3T fields have
been delivered and the design is expected to operate
to 7T.
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| Danfysik
announces 400A DC Current Transducer |
March
8, 2001
GMW Associates is now offering a new addition to
the Danfysik ULTRASTAB Current Transducer product
range for ohmically isolated, precision measurement
of electric current.
Operating on the principle of maintaining zero magnetic
flux in a toroidal core, the 867-400
has a precise 2000:1 current ratio with an output
of ±200mA for a ±400A primary current. The transfer
linearity is better than 3ppm with a temperature
coefficient of less than 0.3ppm/°C. Frequency response
of the output current amplitude is from dc to 100kHz
(-3dB) with a slew rate of ±200mA/16µs for a step
change in primary current. Output current noise
is less than 2ppm(rms) of full-scale from dc to
1kHz. Utilizing an appropriate external burden resistor
enables voltage signal to be obtained e.g. ±1V full-scale
with a 5 ohm burden resistor.
The 867-400 has a mechanical outline of approximately
76mm (3 inch) square by 43mm (1.7 inch) axial length
with a large 26mm (1 inch) diameter central hole
for the primary current conductor. A dual +15V,
-15V (±5%), 250mA power supply is required.
Applications for the 867-400 include current control
of particle accelerator corrector and focussing
electromagnet power supplies, magnetic resonance
imaging (MRI) gradient amplifiers, servo motor amplifiers
and current measurement for precision power metering.
Compared to resistive shunts or Hall effect current
transducers the 867-400 provides greatly improved
stability, lower common mode noise, much better
linearity, reduced hysteresis and enhanced frequency
response.
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Danfysik
buys the Synchrotron Beamlines Group of Oxford
Instruments plc |
February
1, 2001
On January 25, 2001 Mr. Michael Russell (left),
Finance Director of Oxford Instruments Superconductivity
Ltd. and Dr. Bjarne Roger Nielsen, Managing Director
of Danfysik A/S signed the final documents for the
purchase by Danfysik of the Synchrotron Beamlines
Group from Oxford Instruments.
The new company, which will trade under the name
OXFORD
DANFYSIK, is a wholly owned subsidiary of Danfysik
and based at Osney Mead in Oxford.
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Danfysik
to deliver Booster Accelerator for CLS
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March
15, 2000
Danfysik
have been awarded a C$8.9M contract to deliver the
Booster Accelerator for the Canadian Light Source
(CLS) being built at the Saskatchewan
Accelerator Laboratory (SAL) in Saskatoon. The
Booster Accelerator will inject 1.5 to 2.9 GeV energy
electrons into the main synchrotron radiation storage
ring.
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Bergoz
completes testing of new FCT
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March
15, 2000
Bergoz have completed factory testing of a new Fast
Current Transformer FCT with 0.7ns rise time
and 0.1%/µs droop. This prototype will be
delivered to Brookhaven
National Laboratory (BNL) for evaluation as
a device to measure the proton beam current pulses
in the Spallation Neutron Source (SNS) to be built
at the Oak
Ridge National Laboratory (ORNL).
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Group3
CNAs chosen for control of SNS H¯ Ion Source
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March
15, 2000
At the front end of the SNS project, Group3
Control fiber optic isolated input/output modules
(CNAs)
are being used for computer control of the H¯
ion source developed at Lawrence
Berkeley Laboratory (LBL). The fiber optic communication
link enables reliable control and monitoring of
electrical subsystems at high voltage and subject
to electrical transients.
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