Low-noise, high-speed detector development for optical turbulence fluctuation measurements for NSTX

Date

2010-10

Author

Schoenbeck, N. L.
Ellington, S. D.
Fonck, R. J.
Jaehnig, K.
McKee, G. R.
Smith, D.
Uzun Kaymak, İlker Ümit
Winz, G.

Metadata

Show full item record

Item Usage Stats

87
views

0
downloads

A new beam emission spectroscopy (BES) diagnostic is under development. Photon-noise limited measurements of neutral beam emissions are achieved using photoconductive photodiodes with a novel frequency-compensated broadband preamplifier. The new BES system includes a next-generation preamplifier and upgraded optical coupling system. Notable features of the design are surface-mount components, minimized stray capacitance, a wide angular acceptance photodiode, a differential output line driver, reduced input capacitance, doubling of the frequency range, net reduced electronic noise, and elimination of the need for a cryogenic cooling system. The irreducible photon noise dominates the noise up to 800 kHz for a typical input power of 60 nW. This new assembly is being integrated into an upgraded multichannel optical detector assembly for a new BES system on the NSTX experiment. (C) 2010 American Institute of Physics

URI

https://hdl.handle.net/11511/28570

Journal

Review of Scientific Instruments

DOI

https://doi.org/10.1063/1.3483196

Collections

Department of Physics, Article

Suggestions

OpenMETU
Core

Frequency-resolved spectroscopy of XB1323-619 using XMM-Newton data: detection of a reflection region in the disc Balman, Şölen (Oxford University Press (OUP), 2010-09-21) We present the frequency-resolved energy spectra (FRS) of the low-mass X-ray binary dipper XB1323-619 during persistent emission in four different frequency bands using an archival XMM-Newton observation. FRS method helps to probe the inner zones of an accretion disc. XB1323-619 is an Atoll source and a type-I burster. We find that the FRS is well described by a single blackbody component with kT in a range 1.0-1.4 keV responsible for the source variability in the frequency ranges of 0.002-0.04 and 0.07-0.3...
High performance readout and control electronics for mems gyroscopes Şahin, Emre; Akın, Tayfun; Department of Electrical and Electronics Engineering (2009) This thesis reports the development of various high performance readout and control electronics for implementing angular rate sensing systems using MEMS gyroscopes developed at METU. First, three systems with open loop sensing mechanisms are implemented, where each system has a different drive-mode automatic gain controlled (AGC) self-oscillation loop approach, including (i) square wave driving signal with DC off-set named as OLS_SquD, (ii) sinusoidal driving signal with DC off-set named as OLS_SineD, and i...
Low-Cost Fully Autonomous Piezoelectric Energy Harvesting Interface Circuit with up to 6.14x Power Capacity Gain Çiftci, Berkay; Ulusan, Hasan; Yigit, Halil Andac; Koyuncuoglu, Aziz; Muhtaroglu, Ali; Külah, Haluk (2019-01-01) This paper presents a novel self-powered and fully autonomous interface circuit to extract piezoelectric energy from vibrations available in the environment for supplying DC voltage to electronic loads. A new energy extraction technique called Synchronized Switch Harvesting on Capacitor-Inductor (SSHCI) is utilized, which reduces system cost through a downsized inductor in the range of tens of mu H's. while achieving as high voltage flipping efficiency as cony entional SSHI circuits. Fabricated in 180 um st...
Adsorption of RuSex (x=1-5) cluster on Se-doped graphene: First principle calculations AKTÜRK, OLCAY ÜZENGİ; Tomak, Mehmet (2015-08-30) We have investigated the adsorption of RuSex (x =1-5) cluster on Se-doped graphene. The change of the adsorption energy with the number of Se atoms and magnetization values are investigated. Electronic properties of adsorption of RuSex (x =1-5) cluster on Se-doped graphene are investigated. The highest adsorption energy belongs to RuSe adsorbate. The biggest magnetization value belongs to RuSe2 adsorbate. This adsorbate makes the substrate half metallic. This property is important in electronic device appli...
Integrated piezoresistive sensors for atomic force-guided scanning Hall probe microscopy BROOK, ALEX J; BENDİNG, SJ; PINTO, JONATHAN; Oral, Ahmet; RİTCHİE, DAVİD; BEERE, H; HENİNİ, M; SPRİNGTHORPE, A (AIP Publishing, 2003-05-19) We report the development of an advanced sensor for atomic force-guided scanning Hall probe microscopy whereby both a high mobility heterostructure Hall effect magnetic sensor and an n-Al0.4Ga0.6As piezoresistive displacement sensor have been integrated in a single III-V semiconductor cantilever. This allows simple operation in high-vacuum/variable-temperature environments and enables very high magnetic and topographic resolution to be achieved simultaneously. Scans of magnetic induction and topography of a...

Citation Formats

N. L. Schoenbeck et al., “Low-noise, high-speed detector development for optical turbulence fluctuation measurements for NSTX,” Review of Scientific Instruments, 2010, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/28570.