scholarly journals High current, high-temperature operation test of the superconducting magnets in the RHIC yellow ring

2021 ◽  
Author(s):  
Roberto Than ◽  
S Verdú-Andrés ◽  
S Berg ◽  
D Bruno ◽  
R Gupta ◽  
...  
Keyword(s):  
High Temperature ◽  
Superconducting Magnets ◽  
High Current ◽  
Operation Test ◽  
High Temperature Operation

Metallization Technology for High Current Density and High Temperature Operation Power Modules

2019 ◽  
Author(s):  
K. Sugiura ◽  
T. Iwashige ◽  
K. Tsuruta ◽  
Y. Sakuma ◽  
Y. Oda ◽  
...  
Keyword(s):  
High Temperature ◽  
Current Density ◽  
High Current Density ◽  
High Current ◽  
Power Modules ◽  
High Temperature Operation

Fast Switching (41 MHz), 2.5 mΩ•cm2, High Current 4H-SiC VJFETs for High Power and High Temperature Applications

2006 ◽  
Vol 527-529 ◽  
pp. 1183-1186 ◽  
Author(s):  
Lin Cheng ◽  
Janna R. B. Casady ◽  
Michael S. Mazzola ◽  
V. Bondarenko ◽  
Robin L. Kelley ◽  
...  
Keyword(s):  
High Temperature ◽  
Field Effect Transistors ◽  
Vertical Channel ◽  
Drain Current ◽  
Switching Frequency ◽  
High Current ◽  
Linear Region ◽  
Fast Switching ◽  
Increasing Temperature ◽  
High Temperature Operation

In this work we have demonstrated the operation of 600-V class 4H-SiC vertical-channel junction field-effect transistors (VJFETs) with 6.6-ns rise time, 7.6-ns fall time, 4.8-ns turn-on and 5.4-ns turn-off delay time at 2.5 A drain current (IDS), which corresponds to a maximum switching frequency of 41 MHz – the fastest ever reported switching of SiC JFETs to our knowledge. At IDS of 12 A, a 19.1 MHz maximum switching frequency has been also achieved. Specific on-resistance (Rsp-on) in the linear region is 2.5 m·cm2 at VGS of 3 V. The drain current density is greater than 1410 A/cm2 at 9 V drain voltage. High-temperature operation of the 4H-SiC VJFETs has also been investigated at temperatures from 25 °C to 225 °C. Changes in the on-resistance with temperature are in the range of 0.90~1.33%/°C at zero gate bias and IDS of 50 mA. The threshold voltage becomes more negative with a negative shift of 0.096~0.105%/°C with increasing temperature.

Current Sensing for SiC Power Devices

2006 ◽  
Vol 527-529 ◽  
pp. 1215-1218 ◽  
Author(s):  
Dominique Tournier ◽  
Miquel Vellvehi ◽  
Phillippe Godignon ◽  
Josep Montserrat ◽  
Dominique Planson ◽  
...  
Keyword(s):  
High Temperature ◽  
System Integration ◽  
Short Circuit ◽  
Current Sensor ◽  
High Current ◽  
Power Devices ◽  
Process Technology ◽  
Current Sensing ◽  
High Temperature Electronics ◽  
High Temperature Operation

High voltage, high current capabilities of SiC based devices has been already proved, and high current SiC devices working at high temperature are likely to be on the market soon. SiC power integration will have to be considered as a further development step to discrete power devices. Packaging and device integrated protections remain the main constraints for high temperature operation and system integration. In case of short-circuit or over-current, SiC devices can reach high temperature values, and the die might be subjected to high stresses. In order to address such critical requirements, current sensing and real time temperature monitoring are mandatory. The structure proposed in this paper, derived from Si technology, provides a protection feature to SiC power devices to get reliable high temperature electronics. Concretely, an integrated current sensor has been implemented in a vertical power SiC JFET and its fabrication is reported for the first time. The current sensor layout and process technology are presented. An experimental current sensing validation is also reported.

Defect reduction in oxygen implanted silicon-on-insulator material during high-temperature annealing

1989 ◽  
Vol 47 ◽  
pp. 604-605
Author(s):  
P. Roitman ◽  
B. Cordts ◽  
S. Visitserngtrakul ◽  
S.J. Krause
Keyword(s):  
High Temperature ◽  
Annealing Temperature ◽  
Silicon On Insulator ◽  
High Dose ◽  
High Temperature Annealing ◽  
High Current ◽  
Defect Reduction ◽  
Annealing Step ◽  
Multiple Cycle ◽  
Defect Densities

Synthesis of a thin, buried dielectric layer to form a silicon-on-insulator (SOI) material by high dose oxygen implantation (SIMOX – Separation by IMplanted Oxygen) is becoming an important technology due to the advent of high current (200 mA) oxygen implanters. Recently, reductions in defect densities from 109 cm−2 down to 107 cm−2 or less have been reported. They were achieved with a final high temperature annealing step (1300°C – 1400°C) in conjunction with: a) high temperature implantation or; b) channeling implantation or; c) multiple cycle implantation. However, the processes and conditions for reduction and elimination of precipitates and defects during high temperature annealing are not well understood. In this work we have studied the effect of annealing temperature on defect and precipitate reduction for SIMOX samples which were processed first with high temperature, high current implantation followed by high temperature annealing.

High-Temperature Operation of Photonic-Crystal Lasers for On-Chip Optical Interconnection

2012 ◽  
Vol E95.C (7) ◽  
pp. 1244-1251 ◽  
Author(s):  
Koji TAKEDA ◽  
Tomonari SATO ◽  
Takaaki KAKITSUKA ◽  
Akihiko SHINYA ◽  
Kengo NOZAKI ◽  
...  
Keyword(s):  
High Temperature ◽  
Photonic Crystal ◽  
Optical Interconnection ◽  
On Chip ◽  
High Temperature Operation

KUBOTA UCX

Alloy Digest ◽  
2008 ◽  
Vol 57 (6) ◽  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Temperature Performance ◽  
High Temperature Operation ◽  
Oxidation And Corrosion ◽  
Very High

Abstract Kubota UCX was developed for very high temperature operation for ethylene pyrolysis service. The alloy also has excellent oxidation and corrosion resistance. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as casting and joining. Filing Code: Ni-663. Producer or source: Kubota Metal Corporation, Fahramet Division.

scholarly journals Identification of Existing Challenges and Future Trends for the Utilization of Ammonia-Water Absorption–Compression Heat Pumps at High Temperature Operation

2021 ◽  
Vol 11 (10) ◽  
pp. 4635
Author(s):  
Marcel Ulrich Ahrens ◽  
Maximilian Loth ◽  
Ignat Tolstorebrov ◽  
Armin Hafner ◽  
Stephan Kabelac ◽  
...  
Keyword(s):  
High Temperature ◽  
Water Absorption ◽  
Industrial Sector ◽  
Heat Pumps ◽  
Working Fluid ◽  
Large Temperature ◽  
Future Trends ◽  
Ammonia Water ◽  
Starting Point ◽  
High Temperature Operation

Decarbonization of the industrial sector is one of the most important keys to reducing global warming. Energy demands and associated emissions in the industrial sector are continuously increasing. The utilization of high temperature heat pumps (HTHPs) operating with natural fluids presents an environmentally friendly solution with great potential to increase energy efficiency and reduce emissions in industrial processes. Ammonia-water absorption–compression heat pumps (ACHPs) combine the technologies of an absorption and vapor compression heat pump using a zeotropic mixture of ammonia and water as working fluid. The given characteristics, such as the ability to achieve high sink temperatures with comparably large temperature lifts and high coefficient of performance (COP) make the ACHP interesting for utilization in various industrial high temperature applications. This work reviews the state of technology and identifies existing challenges based on conducted experimental investigations. In this context, 23 references with capacities ranging from 1.4 kW to 4500 kW are evaluated, achieving sink outlet temperatures from 45 °C to 115 °C and COPs from 1.4 to 11.3. Existing challenges are identified for the compressor concerning discharge temperature and lubrication, for the absorber and desorber design for operation and liquid–vapor mixing and distribution and the choice of solution pump. Recent developments and promising solutions are then highlighted and presented in a comprehensive overview. Finally, future trends for further studies are discussed. The purpose of this study is to serve as a starting point for further research by connecting theoretical approaches, possible solutions and experimental results as a resource for further developments of ammonia-water ACHP systems at high temperature operation.

Dramatic Improvement in the Rectifying Properties of Pd Schottky Contacts on β -Ga₂O₃ During Their High-Temperature Operation

2021 ◽  
pp. 1-7
Author(s):  
Caixia Hou ◽  
Rodrigo M. Gazoni ◽  
Roger J. Reeves ◽  
Martin W. Allen
Keyword(s):  
High Temperature ◽  
Schottky Contacts ◽  
Dramatic Improvement ◽  
High Temperature Operation

Microstructural modifications and high-temperature oxidation resistance of arc ion plated NiCoCrAlYSiHf coating via high-current pulsed electron beam

2021 ◽  
Vol 182 ◽  
pp. 109281
Author(s):  
Jie Cai ◽  
Chen Li ◽  
Yiming Yao ◽  
Peng Lyu ◽  
Qingfeng Guan ◽  
...  
Keyword(s):  
Electron Beam ◽  
High Temperature ◽  
Oxidation Resistance ◽  
High Temperature Oxidation ◽  
High Current ◽  
Temperature Oxidation ◽  
Pulsed Electron Beam

High-Temperature Operation Method for Image Pickup Tube

2021 ◽  
pp. 1-1
Author(s):  
Yoichiro Neo ◽  
Masato Nakata ◽  
Yukino Kameda ◽  
Yoshinori Hatanaka ◽  
Hidenori Mimura
Keyword(s):  
High Temperature ◽  
Operation Method ◽  
High Temperature Operation
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