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A Time Projection Chamber (TPC) is a powerful detector for 3-dimensional tracking and particle identification for ultra-high multiplicity events. It is the central tracking device of many experiments, e.g. the ALICE experiment at CERN. The…

仪器与探测器 · 物理学 2019-08-14 Bernhard Ketzer

This paper presents an analytical model to quantify the measured noise in a cryogenic bolometer readout circuit. The model includes the contributions from the bias resistors and sensor resistors, voltage and current noise of amplifier, and…

We report on the noise of a lumped element Direct Current Superconducting Quantum Interference Device amplifier. We show that the noise temperature in the 4 GHz-8 GHz range over ranges of 10's of MHz is below 1 kelvin (three photons of…

超导电性 · 物理学 2015-05-20 Lafe Spietz , Kent Irwin , Minhyea Lee , Jose Aumentado

The transport of molecules in confined media is subject to entropic barriers. So theoretically, asymmetry of the confinement length may lead to molecular ratchets with entropy as the only driving force for the biased transport. We address…

软凝聚态物质 · 物理学 2016-12-20 D. Lairez , M. -C. Clochard , J. -E. Wegrowe

Trapped-ion quantum information processors offer many advantages for achieving high-fidelity operations on a large number of qubits, but current experiments require bulky external equipment for classical and quantum control of many ions. We…

We describe a calibration setup for the transresistance of low-current amplifiers, based on the capacitance-charging method. The calibration can be performed in the current range of typical interest for electron counting experiments. The…

仪器与探测器 · 物理学 2016-10-18 Ilaria Finardi , Luca Callegaro

We present an experiment where we tune the decoherence in a quantum interferometer using one of the simplest object available in the physic of quantum conductors : an ohmic contact. For that purpose, we designed an electronic Mach-Zehnder…

介观与纳米尺度物理 · 物理学 2015-05-13 P. Roulleau , F. Portier , P. Roche , A. Cavanna , G. Faini , U. Gennser , D. Mailly

We investigate anomalous ion-motional heating, a limitation to multi-qubit quantum-logic gate fidelity in trapped-ion systems, as a function of ion-electrode separation. Using a multi-zone surface-electrode trap in which ions can be held at…

量子物理 · 物理学 2018-02-21 J. A. Sedlacek , A. Greene , J. Stuart , R. McConnell , C. D. Bruzewicz , J. M. Sage , J. Chiaverini

In this paper we report on a detailed study of ionization signals produced by Compton electrons and alpha-particles in a Time Projection Chamber (TPC) flled with different mixtures of liquid Argon and Nitrogen. The measurements were carried…

仪器与探测器 · 物理学 2011-03-28 M. Zeller , I. Badhrees , S. Delaquis , A. Ereditato , S. Janos , I. Kreslo , M. Messina , U. Moser , B. Rossi

An ultrastable low-noise current amplifier (ULCA) has been transferred between two laboratories, NPL and PTB, four times, with three of the transfers yielding a relative change in the trans-resistance gain of less than $2 \times 10^{-7}$.…

仪器与探测器 · 物理学 2019-03-08 Stephen Giblin , Dietmar Drung , Martin Goetz , Hansjoerg Scherer

Dedicated ionization chamber was built and installed to measure the energy loss of very heavy nuclei at 2.7 MeV/u produced in fusion reactions in inverse kinematics (beam of 208Pb). After going through the ionization chamber, products of…

A transimpedance amplifier has been designed for scanning tunneling microscopy (STM). The amplifier features low noise (limited by the Johnson noise of the 1 G{\Omega} feedback resistor at low input current and low frequencies), sufficient…

仪器与探测器 · 物理学 2020-07-02 Martin Štubian , Juraj Bobek , Martin Setvin , Ulrike Diebold , Michael Schmid

Quantum computing testbeds exhibit high-fidelity quantum control over small collections of qubits, enabling performance of precise, repeatable operations followed by measurements. Currently, these noisy intermediate-scale devices can…

The operation of a typical common emitter amplifier, including negative feedback, is studied taking into account the non-linearity characteristic of real-world transistors. This has been accomplished by employing a recently proposed Early…

仪器与探测器 · 物理学 2018-03-05 Luciano da F. Costa

A small scintillator-based detector for atmospheric ionization measurements has been developed, partly in response to a need for better ionization data in the weather-forming regions of the atmosphere and partly with the intention of…

仪器与探测器 · 物理学 2018-04-23 Karen Aplin , Aaron Briggs , Adam Baird , Peter Hastings , R. Giles Harrison , Graeme Marlton

We demonstrate a microfabricated optomechanical accelerometer that is capable of percent-level accuracy without external calibration. To achieve this capability, we use a mechanical model of the device behavior that can be characterized by…

Dynamic state and parameter estimation methods for dynamic security assessment in power systems are becoming increasingly important for system operators. Usually, the data used for this type of applications stems from phasor measurement…

系统与控制 · 电气工程与系统科学 2022-09-01 Nicolai Lorenz-Meyer , René Suchantke , Johannes Schiffer

Analog In-Memory Compute (AIMC) can improve the energy efficiency of Deep Learning by orders of magnitude. Yet analog-domain device and circuit non-idealities -- within the analog ``Tiles'' performing Matrix-Vector Multiply (MVM) operations…

Radiation-hard ionization chambers were tested using an intense electron beam from the accelerator test facility (ATF) at the Brookhaven National Laboratory (BNL). The detectors were designed to be used as the basic element for monitoring…

仪器与探测器 · 物理学 2009-11-07 J. McDonald , D. Naples , C. Velissaris , A. Erwin , H. Ping , B. Viren , M. Diwan

We consider dephasing in the electronic Mach-Zehnder interferometer strongly coupled to current noise created by a voltage biased quantum point contact (QPC). We find the visibility of Aharonov-Bohm oscillations as a function voltage bias…

介观与纳米尺度物理 · 物理学 2009-07-16 Ivan P. Levkivskyi , Eugene V. Sukhorukov