Journal of Instrumentation最新文献_第7页

An efficient calibration method for digital bandwidth interleaving sampling system 一种有效的数字带宽交错采样系统标定方法

4区工程技术

Journal of Instrumentation Pub Date : 2023-11-01 DOI: 10.1088/1748-0221/18/11/p11001

Yubo Ma, Jie Wu, Xiaochang Jiang, Boyi Xu, Shengyu Qi

{"title":"An efficient calibration method for digital bandwidth interleaving sampling system","authors":"Yubo Ma, Jie Wu, Xiaochang Jiang, Boyi Xu, Shengyu Qi","doi":"10.1088/1748-0221/18/11/p11001","DOIUrl":"https://doi.org/10.1088/1748-0221/18/11/p11001","url":null,"abstract":"Abstract Digital bandwidth interleaving (DBI) is a technique that can simultaneously increase system sampling rate and bandwidth. While DBI can reduce the impact of clock jitter on the dynamic performance of the system compared to time-interleaved sampling systems, achieving dynamic performance comparable to time-interleaved analog-to-digital converters (TIADC) remains challenging due to phase misalignment in crossover bands caused by analog filters and nonlinearity in analog mixers. To address these issues, this paper proposes a method to calibrate DBI sampling systems using PRBS signals. This method involves injecting pseudo-random binary sequence (PRBS) signal into the system input as a background signal and calculating the correlation between the output sampling sequence and the PRBS sequence to obtain the response of each sampling channel. Compared with traditional single tone signal or pulse signal, this method offers a more efficient background calibration method. To verify the effectiveness of this method, this paper designed a hybrid parallel sampling system combining DBI and TIADC with a 20 GSPS sampling rate and 8 GHz bandwidth to evaluate the effectiveness of the calibration method. In the performance test of the sampling system before and after calibration, this calibration method improved the system's Signal-to-Noise and Distortion Ratio (SINAD) by up to 13 dB, Spurious Free Dynamic Range (SFDR) by up to 27 dB, and phase response flatness better than 0.3 radians.","PeriodicalId":16184,"journal":{"name":"Journal of Instrumentation","volume":"35 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135510023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A simple, flexible technique for RF cavity wake-field calculations 一种简单、灵活的射频腔尾流场计算技术

4区工程技术

Journal of Instrumentation Pub Date : 2023-11-01 DOI: 10.1088/1748-0221/18/11/p11004

Brian J. Vaughn

{"title":"A simple, flexible technique for RF cavity wake-field calculations","authors":"Brian J. Vaughn","doi":"10.1088/1748-0221/18/11/p11004","DOIUrl":"https://doi.org/10.1088/1748-0221/18/11/p11004","url":null,"abstract":"Abstract It is typical in the accelerator field to model machine components, especially RF cavities, as parallel RLC resonators. To properly model wake-fields, knowledge of the time-domain voltage resulting from beam excitation is often necessary. While analytical and quasi-analytical expressions are available to accomplish this for common bunch distributions such as the Gaussian, analogous results for less standard distributions can be difficult or computationally-taxing to obtain using direct methods, which opens the door for the development of a more generalized technique. In this paper, a formulation is created that allows for the simple computation of the time-domain voltage waveform of an RLC resonator. The formulation uses the Cauchy Residue Theorem to extract the convolution result from the Fourier Domain, and if current distribution Fourier Transform has no poles, knowledge of its value is only required at one specific evaluation point. This greatly simplifies the computation of the time domain voltage for a large amount of bunch distributions both common and uncommon. Accuracy considerations for this technique and the approximation of accelerator components as RLC resonators are also discussed, resulting the development of a figure of merit for quantifying the robustness of this type of approximation.","PeriodicalId":16184,"journal":{"name":"Journal of Instrumentation","volume":"34 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135514609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

CNR performance of semiconductor materials for X-ray imaging of breast calcifications 乳房钙化x射线成像中半导体材料的CNR性能

4区工程技术

Journal of Instrumentation Pub Date : 2023-11-01 DOI: 10.1088/1748-0221/18/11/t11001

L. Mendoza, C. Avila, R. Rodríguez, L. Loaiza, G. Roque

{"title":"CNR performance of semiconductor materials for X-ray imaging of breast calcifications","authors":"L. Mendoza, C. Avila, R. Rodríguez, L. Loaiza, G. Roque","doi":"10.1088/1748-0221/18/11/t11001","DOIUrl":"https://doi.org/10.1088/1748-0221/18/11/t11001","url":null,"abstract":"Abstract We present the results of a GAMOS/GEANT4 computer simulation of a standard X-ray mammography system, which consists of a Tungsten 28 kVp polychromatic X-ray source with a 50 μm Rh filter, a mammography phantom with Al 2 O 3 spherical specks of different diameters, and a generic pixel detector (55 μm × 55 μm pixel size) with different types of semiconductor sensors. The number of photons simulated is calibrated to produce similar entrance surface dose (ESD) as the one used by a standard clinical mammography screening. Estimates of Contrast to Noise Ratio (CNR) as a function of ESD, sensor thickness and microcalcification diameter are presented for four different sensor materials: Silicon (Si), Cadmium Telluride (CdTe), Gallium Arsenide (GaAs) and Perovskite (MAPbI3). For the X-ray energy spectrum and pixel size considered, and an ESD dose of 4 mGy, our study shows that, with the exception of Si, these sensors, as thin as 200 μm, are able to resolve (with at least 3 standard deviations above background) Al 2 O 3 spherical specks up to a minimum diameter of 180 μm, having statistically compatible CNR performance. The increase in substrate thickness has a substantial improvement in the CNR values provided by the Si sensor, while for the other cases the enhancement of CNR is marginal and consistent with statistical uncertainties with the thinnest case considered.","PeriodicalId":16184,"journal":{"name":"Journal of Instrumentation","volume":"34 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135514610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ultrahigh resolution real-time trajectory imaging of neutron induced particles in a scintillator from lithium-6 plate 锂-6板闪烁体中中子诱导粒子的超高分辨率实时轨迹成像

4区工程技术

Journal of Instrumentation Pub Date : 2023-10-01 DOI: 10.1088/1748-0221/18/10/t10002

Yamamoto Seiichi, Yoshino Masao, Nakanishi Kohei, Kamada Kei, Yoshikawa Akira, Kataoka Jun

{"title":"Ultrahigh resolution real-time trajectory imaging of neutron induced particles in a scintillator from lithium-6 plate","authors":"Yamamoto Seiichi, Yoshino Masao, Nakanishi Kohei, Kamada Kei, Yoshikawa Akira, Kataoka Jun","doi":"10.1088/1748-0221/18/10/t10002","DOIUrl":"https://doi.org/10.1088/1748-0221/18/10/t10002","url":null,"abstract":"Abstract It is known that a lithium-6 ( 6 Li) absorbs a neutron and is divided into a triton and an alpha particle. However, the trajectories of the produced tritons have not yet been imaged in real time and high resolution. We developed an ultrahigh-resolution imaging system that can clearly observe the trajectories of neutron induced particles in real time. The developed system is based on a magnifying unit and a cooled electron multiplying charge-coupled device (EM-CCD) camera combined with a 6 Li plate and a Ce-doped Gd 3 Al 2 Ga 3 O 12 (GAGG) scintillator plate. Neutrons from a californium-252 ( 252 Cf) source were irradiated to the 6 Li plate, which produced tritons and alpha particles. The produced tritons or alpha particles entered the GAGG plate and produced scintillation light along the trajectories. The scintillation trajectories were magnified by the unit, light intensified, and imaged by the EM-CCD camera. Using our system, we could measure the elongated trajectory images of the particles in real time. Most of these trajectories had Bragg peak like shapes in the images. The average range was 15 μm and the width was 4.6 μm FWHM. From the ranges we estimated, we found that these trajectories could be attributed to the induced tritons. Consequently, the developed real time imaging system is promising for research on the ultrahigh resolution imaging of neutron produced particles.","PeriodicalId":16184,"journal":{"name":"Journal of Instrumentation","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134934696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Saturated cavity ringdown spectroscopy at Balmer-α line of atomic hydrogen for estimating sheath electric field in plasma 氢原子Balmer-α线饱和腔衰荡光谱估计等离子体鞘层电场

4区工程技术

Journal of Instrumentation Pub Date : 2023-10-01 DOI: 10.1088/1748-0221/18/10/c10002

Kimika Fushimi, Shusuke Nishiyama, Satoshi Tomioka, Koichi Sasaki

{"title":"Saturated cavity ringdown spectroscopy at Balmer-α line of atomic hydrogen for estimating sheath electric field in plasma","authors":"Kimika Fushimi, Shusuke Nishiyama, Satoshi Tomioka, Koichi Sasaki","doi":"10.1088/1748-0221/18/10/c10002","DOIUrl":"https://doi.org/10.1088/1748-0221/18/10/c10002","url":null,"abstract":"Abstract We applied saturated cavity ringdown spectroscopy (CRDS) to the measurement of the Doppler-free absorption spectrum of the Balmer-α line of atomic hydrogen in an inductively coupled hydrogen plasma. The spectrum was used for estimating the electric field in the sheath region in the vicinity to a biased electrode. The absorption frequency (the absorption coefficient multiplied by the speed of light) and the saturation parameter were estimated by fitting the experimental ringdown curve with the theory reported by Giusfredi and coworkers ( Phys. Rev. Lett. 104 (2010) 110801). We detected the Lamb dip corresponding to the 2 p 2 P o 3/2 - 3 d 2 D 5/2 transition in the absorption spectrum in the field-free condition. We observed the change in the Lamb dip spectrum when we repeated the measurement in the sheath, and we succeeded in estimating the sheath electric field of 220–230 V/cm at a distance of 1.8 mm from the electrode which was biased at -100 V with respect to the ground potential. The experimental results indicate the potential of saturated CRDS for the measurement of sheath electric fields in plasmas.","PeriodicalId":16184,"journal":{"name":"Journal of Instrumentation","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135567229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Picosecond and high-power UV/Vis light pulsing using gallium nitride field-effect transistors: implementation and design evaluation 使用氮化镓场效应晶体管的皮秒和高功率紫外/可见光脉冲:实现和设计评估

4区工程技术

Journal of Instrumentation Pub Date : 2023-10-01 DOI: 10.1088/1748-0221/18/10/p10010

F. Henningsen, N. Braam, M. Danninger

引用次数: 0

Sub-micrometer real-time imaging of trajectory of alpha particles using GAGG plate and CMOS camera 利用GAGG板和CMOS相机对α粒子轨迹进行亚微米实时成像

4区工程技术

Journal of Instrumentation Pub Date : 2023-10-01 DOI: 10.1088/1748-0221/18/10/t10003

Seiichi Yamamoto, Masao Yoshino, Kohei Nakanishi, Katsunori Yogo, Kei Kamada, Akira Yoshikawa, Nanase Koshikawa, Jun Kataoka

{"title":"Sub-micrometer real-time imaging of trajectory of alpha particles using GAGG plate and CMOS camera","authors":"Seiichi Yamamoto, Masao Yoshino, Kohei Nakanishi, Katsunori Yogo, Kei Kamada, Akira Yoshikawa, Nanase Koshikawa, Jun Kataoka","doi":"10.1088/1748-0221/18/10/t10003","DOIUrl":"https://doi.org/10.1088/1748-0221/18/10/t10003","url":null,"abstract":"Abstract High-resolution and real-time imaging of the trajectories of alpha particles is desired in nuclear medicine and nuclear engineering. Although an imaging method using a scintillator plate combined with a magnifying unit and a cooled electron multiplying charge-coupled device (EM-CCD) camera is a possible method of obtaining high-resolution trajectory images, the spatial resolution of the system is limited to ∼2 μm. To overcome the spatial resolution limitations of this method on trajectory imaging, we used a cooled complementally metal oxide (CMOS) camera in which the sensor had a much larger number of pixels, which were also smaller. Using the CMOS camera based imaging system, we could measure the trajectories of alpha particles in real time with the spatial resolution of 0.34 μm FWHM. With smoothing of the images to reduce image noise, spatial resolution was still kept to less than 0.75 μm. We conclude that this CMOS camera-based alpha-particle trajectory-imaging system is promising for alpha-particle or other particles imaging where ultrahigh spatial resolution is required.","PeriodicalId":16184,"journal":{"name":"Journal of Instrumentation","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135656898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design and application testing of imaging probe for strain measurement 应变测量成像探头的设计与应用试验

4区工程技术

Journal of Instrumentation Pub Date : 2023-10-01 DOI: 10.1088/1748-0221/18/10/p10011

Peifeng Yu, Jie Cheng, Minwen Tang, Feng lin, Zezhan Zhang, Shan Gao, Yi Niu, Chao Wang, Jing Jiang

引用次数: 0

Edge Thomson scattering diagnostic with compact polychromators on the HL-3 Tokamak HL-3托卡马克上紧凑多色器的边缘汤姆森散射诊断

4区工程技术

Journal of Instrumentation Pub Date : 2023-10-01 DOI: 10.1088/1748-0221/18/10/c10019

S.B. Gong, T.C. Zhang, W.P. Guo, Z.P. Hou, W.Y. Zhai, C.H. Liu, B.H. Deng, Z.B. Shi, W. Chen, W.L. Zhong, M. Xu, X.R. Duan

{"title":"Edge Thomson scattering diagnostic with compact polychromators on the HL-3 Tokamak","authors":"S.B. Gong, T.C. Zhang, W.P. Guo, Z.P. Hou, W.Y. Zhai, C.H. Liu, B.H. Deng, Z.B. Shi, W. Chen, W.L. Zhong, M. Xu, X.R. Duan","doi":"10.1088/1748-0221/18/10/c10019","DOIUrl":"https://doi.org/10.1088/1748-0221/18/10/c10019","url":null,"abstract":"Abstract The edge Thomson scattering (ETS) diagnostic with compact polychromators on the HL-3 Tokamak was developed recently. The energy and repetition frequency of the Nd: YAG laser are 2.0 J and 30 Hz, respectively. The laser beam propagates vertically through the plasma region and the scattered light is observed horizontally. The projected scattering region at the plasma midplane is from 0.6 < r/a < 1.0. The 5-channel compact polychromator (width 432 mm, depth 472 mm and height 88 mm) is developed to measure the Thomson scattering spectra. Modular design in the power supply and the amplifier circuits simplifies the assembly and maintenance of the polychromator. By using the new narrow band filters with cut-off depth larger than OD 4, the stray light resulted from Nd: YAG laser has been suppressed by the polychromator. The signal to noise ratio (SNR) range of each channel is from 10 to 200 depending on plasma parameters. The designed electron temperature measurement range is from 5 to 1000 eV and electron density measurement range is from 5 × 10 18 to 1 × 10 20 m -3 . New measurement results of electron temperature by ETS are compared with that from the electron cyclotron emission (ECE) radiometer. The time evolution of ETS and ECE matches with each other in different plasma discharges. Combined with the data from the core Thomson scattering diagnostic system, the plasma electron temperature profile on the HL-3 tokamak is presented for the first time.","PeriodicalId":16184,"journal":{"name":"Journal of Instrumentation","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136059226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simulation study of total ionizing dose effect of gamma radiation on 15 nm bulk FinFET 辐射对15nm块体FinFET总电离剂量效应的模拟研究

4区工程技术

Journal of Instrumentation Pub Date : 2023-10-01 DOI: 10.1088/1748-0221/18/10/p10027

J.Q. Fan, T.H. Hou, Q. Zhao, F. Zhang, K. Li, J. Fang, J.H. Hao, Z.W. Dong

引用次数: 0