Results 71 to 80 of about 11,359 (235)

First 20 Years of Orbitrap Mass Spectrometry as the Mainstream Analytical Technique

Mass Spectrometry Reviews, EarlyView.
ABSTRACT This review traces the first 20 years of Orbitrap mass spectrometry as a mainstream high‑resolution and accurate‑mass (HR/AM) technology. It outlines the historical development of the Orbitrap analyzer, the evolution of major instrument families, and the key technological innovations that enabled its widespread adoption. Particular emphasis is
Alexander Makarov
wiley   +1 more source

Revisiting Inductively Coupled Wireless Coils in MRI: Mitigating Over‐Coupling With Preamplifiers

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose Inductively coupled coils enhance local MRI sensitivity, yet strong coupling with nearby primary coils typically causes resonance splitting and impedance mismatch, which are traditionally considered detrimental. This work investigates why inductively coupled coils can still function effectively even in the presence of severe coupling ...
Ming Lu, John C. Gore, Xinqiang Yan
wiley   +1 more source

Quasi-static Analysis Based on an Equivalent Circuit Model for a CMOS Terahertz Plasmon Detector in the Subthreshold Region

Sensors, 2019
An analytic method for a complementary metal-oxide-semiconductor (CMOS) terahertz plasmon detector operating in the subthreshold region is presented using the equivalent circuit model.
Ju-Hee Son, Jong-Ryul Yang
doaj   +1 more source

Optical Detuning Strategies for Shielded Loop Resonators

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To compare detuning performance and evaluate power requirements of optical detuning methods and to demonstrate feasibility of an optically‐detuned 4‐channel receive array. Methods Four optical detuning methods were compared in simulations, bench tests, and phantom measurements at 3T against conventional galvanic detuning.
Jakob Gerlach, Reza Aghabagheri, Zining Liu, Shuai Liu, Morteza Teymoori, Çağlar Ataman, Michael Bock, Ali Caglar Özen   +7 more
wiley   +1 more source

Valve vs. solid-state microphone preamplifier: a comparative study

Fields, 2017
This paper outlines research carried out to determine the perceptual and objective differences between a solid-state and a valve preamplifier running at low voltages. ABX testing was employed and showed that there were perceivable differences between the
doaj   +2 more sources

Evaluation of 7 Tesla pTx Body Coils Regarding Transmit and Receive Performance

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose Most sites develop and use custom coils for 7 T body MRI since no standard pTx body coil exists, leading to diverse coil designs differing in transmit element type, layout, and number of receive channels. This study investigates and compares eight existing coils, including one remote body coil array and seven local arrays, regarding ...
Johannes A. Grimm, Oliver Kraff, Markus W. May, Max Lutz, Stephan Orzada, Thomas M. Fiedler, Steen Moeller, Simon Schmidt, Harald H. Quick, Armin M. Nagel, Mark E. Ladd, Sebastian Schmitter   +11 more
wiley   +1 more source

Gallium Nitride High-Electron-Mobility Transistor-Based High-Energy Particle-Detection Preamplifier

Metrology
GaN High-Electron-Mobility Transistors have gained some foothold in the power-electronics industry. This is due to wide frequency bandwidth and power handling. Gallium Nitride offers a wide bandgap and higher critical field strength compared to most wide-
Gilad Orr, Moshe Azoulay, Gady Golan, Arnold Burger   +3 more
doaj   +1 more source

Sonified Signals From a Compact FT‐ICR Instrument: A Feasibility Study. I—Data Mapping to an Equal‐Tempered Chromatic Scale

Rapid Communications in Mass Spectrometry, EarlyView.
ABSTRACT Rationale Ions trapped within a Penning cell (ICR) travel periodic orbits whose frequencies are dependent on their mass‐to‐charge ratio and the value of the magnetic field passing through the trap. Fourier transformation (FT‐ICR) decomposes the signal induced in the detection circuit by the rotation of the ions in the cell after the ...
Patrick Arpino, Michel Heninger
wiley   +1 more source

Laser‐Direct Printed 2D Material‐Based Heterostructure for the Fabrication of Electronic Devices

Small, EarlyView.
The Digital Laser‐Induced Forward Transfer (LIFT) approach is employed to pattern and stack 2D materials with micrometer‐scale precision. PdSe2 and MoSe2 are assembled into vertical p–n junctions, with graphene serving as a transparent electrode. The resulting laser‐transferred heterostructures exhibit high material quality and stable rectifying ...
Ilias Cheliotis, Filimon Zacharatos, Avraham Twitto, Michal Poplinger, Adi Levi, Amaia Pesquera, Amaia Zurutuza, Iakovos Kritikos, Stefania Skorda, Alexandros El Sachat, Yuri Mikhlin, Doron Naveh, Ioanna Zergioti   +12 more
wiley   +1 more source

Development of Low-noise Preamplifier for Low-field NMR

Chinese Journal of Magnetic Resonance
Nuclear magnetic resonance (NMR) technology enables the acquisition of multi-scale molecular dynamics by characterizing the variation of relaxation times under different magnetic field conditions, thereby offering a critical detection methodology for ...
LI Keyan, CHENG Xin, CHEN Junfei, CAO Li, HUANG Zhen, LIU Chaoyang   +5 more
doaj   +1 more source