A5101941001- Superconducting Materials and Applications
- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Semiconductor materials and devices
- Radio Frequency Integrated Circuit Design
- Semiconductor Quantum Structures and Devices
- Semiconductor Lasers and Optical Devices
- Advancements in Semiconductor Devices and Circuit Design
- Speech Recognition and Synthesis
- Photonic and Optical Devices
- Solar Thermal and Photovoltaic Systems
- Low-power high-performance VLSI design
- Physics of Superconductivity and Magnetism
- Spacecraft and Cryogenic Technologies
- Silicon and Solar Cell Technologies
- Nanowire Synthesis and Applications
- Speech and Audio Processing
- HVDC Systems and Fault Protection
- Microwave Engineering and Waveguides
- Photovoltaic System Optimization Techniques
- 3D IC and TSV technologies
- Satellite Communication Systems
- GaN-based semiconductor devices and materials
- IPv6, Mobility, Handover, Networks, Security
- Magnetic confinement fusion research
University of Twente
2022-2023
IMEC
2020-2022
Fermi National Accelerator Laboratory
2000-2004
Fermi Research Alliance
2002-2004
SLAC National Accelerator Laboratory
2002-2003
Voice Activity Detection (VAD) is a technique used to identify the presence of human voice in an audio signal. It implemented as always-on component most speech processing applications. As absent time, this typically dominates overall average power consumption system (excluding microphone). The widespread usage applications and need for ultra low VAD have led plethora algorithms implementations hardware domain, necessitating comprehensive study analysis understand (real-time) requirements,...
In this paper, we will discuss the progress that has been made in upscaling GaN and InP to a Si platform as well making them CMOS 3D compatible enable heterogeneous systems be needed for 5G mm-wave 6G sub-THz frequencies high-capacity wireless communication.
Fermilab, in collaboration with LBNL and BNL, is developing a quadrupole for installation the interaction region inner triplets of LHC. This magnet required to have an operating gradient 215 T/m across 70 mm coil bore, operates superfluid helium at 1.9 K. A 2 m program addressing mechanical, magnetic, quench protection, thermal issues associated design was completed earlier this year, production first full length, cryostatted prototype underway. paper summarizes conclusions program, status...
In this work, we will address the opportunities of a hybrid III-V/CMOS technology for next generation wireless communication, beyond 5G, moving to operating frequencies above 100GHz. Challenges related III-V upscaling and CMOS co-integration using 3D technologies be discussed.
Two short Nb/sub 3/Sn dipole models based on a single-bore cos-theta coil with cold iron yoke were fabricated and tested at Fermilab. This paper summarizes the details of magnet design fabrication procedure, reports test results including quench performance heater studies, magnetic measurements.
Fermilab is building eighteen full length cold masses for the LHC Interaction Region inner triplets. One prototype and several production assemblies have been completed. This paper summarizes construction details. Topics include coil fabrication, ground insulation, collaring, instrumentation, electrical testing, final assembly. In-process measurements are presented explained. Problems encountered during their solutions discussed.
Superconducting quadrupole magnets for the interaction regions of Large Hadron Collider are being developed by US-LHC Accelerator Project. These 70 mm bore intended to operate in superfluid helium at 1.9 K with a nominal field gradient 215 T/m. A series 2 m model has been built and cold tested Fermilab optimize their design construction study performance magnets. Field measurements 8 comparisons required quality reported this paper.
Fermilab and LBNL are in the midst of superconducting magnet R&D program to test optimize design quadrupoles be used LHC Interaction Region inner triplets. The magnets required deliver a 215 T/m gradient across 70 mm aperture. Five quadrupole short models have been fabricated four them tested. This paper describes last model details reports results quench performance study.
Superconducting quadrupole magnets for the interaction regions of Large Hadron Collider are being developed by US-LHC Accelerator Project. These 70 mm bore intended to operate in superfluid helium at 1.9 K with a nominal field gradient 215 T/m. A series 2 m model built and tested Fermilab optimize design construction parameters. Measurements quality date comparisons required reported this paper.
Interaction region inner triplets are among the systems which may limit LHC performance. An option for a new higher luminosity IR is double-bore triplet with separation dipoles placed in front of first quadrupole. The radiation load on dipole, resulting from pp-interactions, key parameter to determine feasibility this approach. Detailed energy deposition calculations were performed MARS 14 code two Nb/sub 3/Sn dipole designs no superconductor mid-plane. Comparison peak power densities those...
As part of the US-LHC Accelerator Project, Fermilab is producing fully cryostated assemblies that will be installed as Q1, Q2 and Q3 optical elements for LHC Inner Triplets. The main quadrupole magnets in Q1 (LQXA) (LQXC) are MQXA designed fabricated by KEK Toshiba, while those (LQXB) MQXB quadrupoles Fermilab. cryostat all Fermilab, final assembly occurs at This paper describes production test results second LQXB assembly.
This paper describes the double aperture dipole magnets developed for a VLHC based on Nb/sub 3/Sn superconductor, cos-theta coil, cold and warm iron yokes, wind-and-react fabrication technique. Status of model R&D program, strand cable other major component development are also discussed.
A series of model magnets is being constructed and tested at Fermilab in order to verify the design high gradient quadrupole for LHC interaction region inner triplets. The 2 m models are built refine mechanical magnetic design, optimize fabrication assembly tooling, ensure adequate quench performance. This has been carried out using a complementary combination analytical FEA modeling, empirical tests on 0.4 assemblies testing during under cryogenic conditions. results these studies have led...
A short dipole model with the 10-11 T nominal field based on Nb/sub 3/Sn superconducting strand is being developed at Fermilab in collaboration LBNL and KEK as part of R&D effort for VLHC. This paper describes magnet conceptual design parameters well results magnetic field, mechanical quench protection calculations. Parameters cable are also reported.
Fermilab has constructed a number of 2 m model quadrupoles as part an ongoing program to develop and optimize the design for LHC Interaction Region inner triplets. The quadrupole is based upon two layer shell type coil multi-filament NbTi strands in Rutherford cable, insulated with Kapton film. As such, size mechanical properties are critical achieving desired prestress field quality targets agent. Throughout magnet program, different manufacturing techniques have been studied obtain coils...
A dipole magnet based on the common coil design, using prereacted Nb/sub 3/Sn superconductor, is under development at Fermilab, for a future Very Large Hadron Collider. This has some innovative design and technological features such as single layer coils, 22 mm wide 60-strand Rutherford type cable stainless steel collars reinforced by horizontal bridges inserted between blocks. Both left right coils are wound simultaneously into collar structure then impregnated with epoxy. In order to...
To provide a quick feedback on different approaches to superconducting cable splicing design and assembly techniques, current transformer that can deliver more than 20 kA for testing splice samples was designed fabricated. The existing infrastructure of the Short Sample Test Facility at Fermilab, including its cryostat, power supply, data acquisition system, used housing operating transformer. This report presents features main results tests.
Compound semiconductors will play a crucial role in reaching the high datarates of future wireless systems operating mmWave or sub-THz bands at decent energy consumption. Their compatibility with Si platform is desired to enable level integration (i.e., complex functionality), as well large-volume, low-cost production. We report here possibilities offered by nanoridge engineering meet these targets.
Fermilab, as part of the US-LHC Accelerator Project, has designed and is producing superconducting low-beta quadrupole magnets for Large Hadron Collider (LHC). These 70 mm bore, 5.5 m long operate in superfluid helium at 1.9 K with a maximum operating gradient 214 T/m. Two quadrupoles, combined dipole orbit corrector, form single LQXB cryogenic assembly, Q2 optical element final focus triplets LHC interaction regions. Field quality was measured room temperature during fabrication cold masses...
Common coil dipole magnets based on Nb/sub 3/Sn conductor and the react-and-wind technology are a promising option for next generation of hadron colliders. The has potential cost benefits related to less expensive cable insulation, structural materials magnet fabrication. A common design allows use pre-reacted superconductor with low critical current degradation after bending. Fermilab in collaboration LBNL is involved development single-layer common-coil maximum field 11 T 40-50 mm aperture...
As part of the US LHC program to provide high gradient superconducting quadrupoles for interaction regions, a 5.5 meter long prototype magnet has been built and tested horizontally in production type cryostat at Fermilab. This was used validate mechanical magnetic design, fabrication assembly tooling. The first met requirements operating 215 T/m with excellent field harmonics. paper summarizes test results this magnet, including quench tests behavior over several thermal cycles.
As a first step towards the development of high field Nb/sub 3/Sn superconducting dipole for Very Large Hadron Collider (VLHC), short mechanical model was built and tested at Fermilab. The aim this work to develop simpler fabrication techniques test new structural materials use in model. coil design based on two-layer, cos(B) approach. end parts were designed using ROXIE magnet optimization program manufactured 6-axis EDM machine. two layers each half-coil wound one piece cable without any...
Superconducting quadrupole magnets operating in superfluid helium at 1.9 K, with 70 mm bore and nominal field gradient of 205 T/m collision optics, are being developed by the US LHC Accelerator Project for Interaction Regions Large Hadron Collider (LHC). A magnet model program to validate optimize design is underway. This paper reports results quality measurements four magnets.