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비냉각 적외선 열상장비용 CMOS Readout IC 설계
한석룡,윤동한,강대석,박재우,송성해,신경욱,우회구,윤태준,이상돈 金烏工科大學校 1998 論文集 Vol.19 No.-
A CMOS readout circuit for uncooled infrared Focal Plane Array (FPA) deteftor is presented, which is a key component in InfraRed (IR) imaging systems. The designed readout circuit satisfies various design requirements and constraints such as impedance matching, low noise, large dynamic range, low power dissipation and small pitch size. For impedance matching between the detector and preamplifier, a new circuit based on MOS diode structure with variable substrate biasing is devised. Also, tunable low pass filter with single-pole is used to suppress high frequency noise. In addition, a clamp circuit is used to enhance the signal-pole is used to suppress high frequency noise. In addition, a clamp circuit is used to enhance the signal-to-noise ratio of the readout output signals. A prototype 64×64 ROIC is designed using 0.65-㎛ 2P3M (double poly, tripple metal) N-Well CMOS process. It contains 62,000 devices including transistors, capacitors and resistors on an area of about 6.3×6.7㎟.
J. R. Hahn 대한화학회 2005 Bulletin of the Korean Chemical Society Vol.26 No.7
A variable-low temperature scanning tunneling microscope (VT-STM), which operates from 77 to 350 K in ultrahigh vacuum, was built and used to study imaging and manipulation of benzene molecules on Si surfaces. Four types of benzene adsorption structures were first imaged on the Si(5 5 12)-2x1 surface. Desorption process of benzene molecules by tunneling electrons was studied on the Si(001)-2xn surface.
Achievements and lessons learned from the operation of KSTAR plasma control system upgrade
Hahn, Sang-hee,Penaflor, B.G.,Milne, P.G.,Bak, J.G.,Eidietis, N.W.,Han, H.,Hong, J.S.,Jeon, Y.M.,Johnson, R.D.,Kim, H.-S.,Kim, HeungSu,Kim, Y.J.,Kwon, G.I.,Lee, W.R.,Woo, M.H.,Sammuli, B.S.,Walker, M. Elsevier 2018 Fusion engineering and design Vol.130 No.-
<P><B>Abstract</B></P> <P>Results on the integration and the operation of the KSTAR plasma control system (PCS) upgrade are given. Real-time hardware, new realtime-capable operating system, and a brand-new data acquisition are assembled in order to extend the performance and compatibility with modern computer systems. The first full commissioning and eventual routine use performed in 2016 so that the system can now acquire more than 400 channels for more than 100 seconds of data with 5 kHz sampling. The performance test results are summarized, featuring In/Out streaming echo tests and the synchronization verifications. Examples of general performance improvements are demonstrated, and additional features added to the software are also described.</P>
Progress and plan of KSTAR plasma control system upgrade
Hahn, S.h.,Kim, Y.J.,Penaflor, B.G.,Bak, J.G.,Han, H.,Hong, J.S.,Jeon, Y.M.,Jeong, J.H.,Joung, M.,Juhn, J.W.,Kim, J.S.,Kim, H.S.,Lee, W.R.,Woo, M.H.,Eidietis, N.W.,Ferron, J.R.,Humphreys, D.A.,Hyatt, North-Holland ; Elsevier Science Ltd 2016 Fusion engineering and design Vol.112 No.-
The plasma control system (PCS) has been one of essential systems in annual KSTAR plasma campaigns: starting from a single-process version in 2008, extensive upgrades are done through the previous 7 years in order to achieve major goals of KSTAR performance enhancement. Major implementations are explained in this paper. In consequences of successive upgrades, the present KSTAR PCS is able to achieve ~48s of 500kA plasma pulses with full real-time shaping controls and real-time NB power controls. It has become a huge system capable of dealing with 8 separate categories of algorithms, 26 actuators directly controllable during the shot, and real-time data communication units consisting of +180 analog channels and +600 digital input/outputs through the reflective memory (RFM) network. The next upgrade of the KSTAR PCS is planned in 2015 before the campaign. An overview of the upgrade layout will be given for this paper. The real-time system box is planned to use the CERN MRG-Realtime OS, an ITER-compatible standard operating system. New hardware is developed for faster real-time streaming system for future installations of actuators/diagnostics.
Hahn, J. R. Korean Chemical Society 2005 Bulletin of the Korean Chemical Society Vol.26 No.7
A variable-low temperature scanning tunneling microscope (VT-STM), which operates from 77 to 350 K in ultrahigh vacuum, was built and used to study imaging and manipulation of benzene molecules on Si surfaces. Four types of benzene adsorption structures were first imaged on the Si(5 5 12)-2x1 surface. Desorption process of benzene molecules by tunneling electrons was studied on the Si(001)-2xn surface.