Precision Four-Quadrant Current Source Vch-500-12r For Superconducting Solenoids

2017 ◽  
Vol 12 (2) ◽  
pp. 138-141
Author(s):  
Yuriy Aktershev ◽  
Sergey Vasichev ◽  
Vladimir Veremeenko
Keyword(s):  
Particle Physics ◽  
Current Source ◽  
Continuous Operation ◽  
Switching Losses ◽  
Energy Recuperation ◽  
Current Instability ◽  
Normal Current ◽  
Four Quadrant ◽  
Voltage Conversion ◽  
Physics Experiments

A precision controllable bidirectional current source 0-500A for superconducting solenoids used in particle physics experiments has been proposed. This article discusses the operation principle of the designed device including a 40-kHz voltage conversion with subsequent synchronous rectification and an approach to energy recuperation from large inductive loads. It also presents some circuit designs aimed at reducing switching losses and increasing the overall efficiency. Current instability for 8 hours of continuous operation is no more than 0.01 % of the normal current.

scholarly journals Programmable combinational logic trigger system for high energy particle physics experiments

1977 ◽  
Vol 140 (3) ◽  
pp. 549-552 ◽  
Author(s):  
E.D. Platner ◽  
A. Etkin ◽  
K.J. Foley ◽  
J.H. Goldman ◽  
W.A. Love ◽  
...  
Keyword(s):  
Particle Physics ◽  
High Energy ◽  
High Energy Particle ◽  
Combinational Logic ◽  
Trigger System ◽  
Energy Particle ◽  
Physics Experiments

scholarly journals PROBING GRAVITATIONAL INTERACTIONS OF ELEMENTARY PARTICLES

2004 ◽  
Vol 13 (10) ◽  
pp. 2355-2359 ◽  
Author(s):  
JONATHAN L. FENG ◽  
ARVIND RAJARAMAN ◽  
FUMIHIRO TAKAYAMA
Keyword(s):  
Dark Matter ◽  
Early Universe ◽  
Particle Physics ◽  
Gravitational Constant ◽  
Planck Scale ◽  
Elementary Particles ◽  
Supersymmetric Particle ◽  
Small Scales ◽  
Physics Experiments ◽  
Shed Light

The gravitational interactions of elementary particles are suppressed by the Planck scale M*~1018 GeV and are typically expected to be far too weak to be probed by experiments. We show that, contrary to conventional wisdom, such interactions may be studied by particle physics experiments in the next few years. As an example, we consider conventional supergravity with a stable gravitino as the lightest supersymmetric particle. The next-lightest supersymmetric particle (NLSP) decays to the gravitino through gravitational interactions after about a year. This lifetime can be measured by stopping NLSPs at colliders and observing their decays. Such studies will yield a measurement of Newton's gravitational constant on unprecedentedly small scales, shed light on dark matter, and provide a window on the early universe.

scholarly journals The use of Convolutional Neural Networks for signal-background classification in Particle Physics experiments

2020 ◽  
Vol 245 ◽  
pp. 06003
Author(s):  
Venkitesh Ayyar ◽  
Wahid Bhimji ◽  
Lisa Gerhardt ◽  
Sally Robertson ◽  
Zahra Ronaghi
Keyword(s):  
Neural Networks ◽  
Convolutional Neural Networks ◽  
Particle Physics ◽  
Simulated Data ◽  
Image Data ◽  
Use Case ◽  
Neural Architecture ◽  
Ice Cube ◽  
2D And 3D ◽  
Physics Experiments

The success of Convolutional Neural Networks (CNNs) in image classification has prompted efforts to study their use for classifying image data obtained in Particle Physics experiments. Here, we discuss our efforts to apply CNNs to 2D and 3D image data from particle physics experiments to classify signal from background. In this work we present an extensive convolutional neural architecture search, achieving high accuracy for signal/background discrimination for a HEP classification use-case based on simulated data from the Ice Cube neutrino observatory and an ATLAS-like detector. We demonstrate among other things that we can achieve the same accuracy as complex ResNet architectures with CNNs with less parameters, and present comparisons of computational requirements, training and inference times.

scholarly journals Space vector PWM sequence and harmonic comparison for high power current source rectifier

2021 ◽  
Author(s):  
Nagaraja H. Chikkegowda
Keyword(s):  
High Power ◽  
Current Source ◽  
Switching Frequency ◽  
Space Vector Pwm ◽  
Vector Sequence ◽  
Space Vector ◽  
Switching Losses ◽  
Vector Sequences ◽  
Vector Modulation ◽  
A Current

The space vector PWM (SVPWM) schemes for high power current source drives normally produce low order harmonics due to low switching frequency. To provide a SVPWM with the best harmonic performance, different space vector sequences suitable for a current source rectifier (CSR) are investigated in this project. Details on how to achieve the waveform symmetries with minimum switching frequency for each sequence are discussed. A thorough comparison of the harmonic performance of different space vector sequences based on current source rectifier implementations is carried out. An optimum space vector modulation (SVM) method is proposed to achieve the best line current THD and reduced switching losses. The space vector sequence investigation has been verified in simulation and experimentally using a 10kVA GCT based CSR prototype.

Integrated circuits for particle physics experiments

2000 ◽  
Vol 35 (12) ◽  
pp. 2018-2030 ◽  
Author(s):  
W. Snoeys ◽  
G. Anelli ◽  
M. Campbell ◽  
E. Cantatore ◽  
F. Faccio ◽  
...  
Keyword(s):  
Integrated Circuits ◽  
Particle Physics ◽  
Physics Experiments
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