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Studies of rf Cavity＇s Bias Current

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近代物理研究所和兰州重离子加速器实验室年报：英文版 2007年第1期 168-168页

作者： Yi Xiaoping Xu Zhe Wang Chunxiao rf group

A High-speed Low-power Pulse-swallow Divider with Robustness Consideration

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A High-speed Low-power Pulse-swallow Divider with Robustness...

Control System Design of rf Tank Circuit

2008 9th International Conference on Solid-State and Integrated-Circuit Technology

作者： Jie Pan 1 2 3 Haigang Yang 1 * and Li-wu Yang 3 1 Institute of Electronics Chinese Academy of Sciences Beijing 100190 China 2 Graduate University of the Chinese Academy of Sciences Beijing 100049 China 3 rf Application group SMIC Shanghai 201203 China Institute of Electronics Chinese Academy of Sciences Graduate University of the Chinese Academy of Sciences rf Application group SMIC

A high-speed low-power programmable pulse-swallow divider is designed and fabricated in SMIC 0.18-μm CMOS process. Two critical paths that limit the operating frequency are analyzed. The proposed prescaler based on a shift-register-ring is insensitive to the Modulus Control （MC） during its first few input cycles, and thus wrong divide ratio caused by the MC’s delay can be avoided. The proposed pulse generator works as a sample/hold block to widen the time slot of the reading process, and thus failure in reading external control words into the swallow counter can also be avoided. A 3.5-GHz integer phase-locked loop （PLL） that uses the divider employing the proposed prescaler and pulse generator provides 21 channels with a 1.2-ppm precision in measurements. The power dissipation is 0.475-mW from a 1.2-V supply under 1.6-GHz operating frequency.

关键词： [IEEE Keyword]Radio frequency Clocks Delay Phase locked loops Pulse generation Frequency conversion Radiation detectors

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近代物理研究所和兰州重离子加速器实验室年报：英文版 2007年第1期 167-167页

作者： Yi Xiaoping Shi Aimin Ren Hongwen Zhang Shenghu rf group

Status of Plasma in-situ Cleaning from Vertical Test Towards Online

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IMP & HIrfL Annual Report 2019年第1期 301-301页

作者： Wu Andong Huang Shichun Jiang Tiancai Li Chunlong Tan Teng Yang Ziqing rf Surface Technology group 不详

The reactive oxygen plasma cleaning was proved an efficient method to decrease the field emission effect of the HWR superconducting cavities on the vertical test platform.

关键词： Plasma effect cleaning

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高频腔偏磁电流研究(英文)

IMP & HIrfL Annual Report 2007年 168-168页

作者：仪孝平 rf group

The main-technical problem is the matching of rf cavity. The current rf cavity of accelerator adopt a special coaxial cavity resonator with single gap, which is loaded with ferrite materials and used for rf1 of CSRm. Because the work frequency is varied frequently and largely, it is important that the ferrite material

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高频槽路控制系统设计(英文)

IMP & HIrfL Annual Report 2007年 167-167页

作者：仪孝平 rf group

This paper mainly introduces a kind of control system of rf tank circuit which is applied for SSC. rf generator of SSC works at a fixed frequency,so the parameters of tank circuit must be renewed during changing frequ...

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Annual Report of rf Surface Technology group

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IMP & HIrfL Annual Report 2022年第1期 275-275页

作者： Tan Teng on behalf of the group 不详

*** Information rf Surface Technology group(hereafter referred as"Surface group")belongs to the Linac center of Institute of Modern *** primary goal for Surface group is to carry out the duty of Srf cavity processing ... 详细信息

关键词： hereafter cavity carry

Genetic variability of Rhizoctonia solani Kühn and its resistance to fungicides

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Studies in Fungi 2020年第1期5卷 381-391页

作者： Castillo rf Gallegos G Flores OA Aguilar GC Rodriguez HR Hernandez CFD Saltillo Experimental Station Instituto Nacional de Investigaciones Forestales Agrícolas y Pecuarias.Carr.Saltillo-Zacatecas km 342+119No.9515Col.ExHacienda de BuenavistaSaltilloCoah.C.P.25315 Department of Agricultural Parasitology Universidad Autónoma Agraria Antonio NarroBuenavista25315SaltilloCoahuilaMéxico Food Research Department School of Chemical SciencesUniversidad Autónoma de Coahuila25000SaltilloCoahuilaMexico

The aims of this study are to determine the population genetic structure of Rhizoctonia solani,associated with potato,and to assess its resistance degree to pencycuron and thiabendazole fungicides.A total of 57 strains of *** were isolated from different potato crop fields in Mexico,and were classified according to their anastomosis group(AG)using the polymerase chain reaction(PCR)and restriction fragment length polymorphism(rfLP)-based ***,the amplified fragments were digested with four different endonucleases(Mse I,Ava II,Mun I and Hinc II).The Repetitive Element Sequence-Based PCR(rep-PCR)technique was used to determine the genetic diversity in *** *** obtained by PCR-rfLP showed that 81%of the isolates were identified as belonging to AG-3 group,14%to AG1-1B and 5%to AG-11 *** response to fungicides inhibition,IC_(50)between 0.014-0.039 mg a.i./L for pencycuron,and 0.82 to 2.91 for thiabendazole were determined,This IC_(50)value showed that the resistance factor(rf)values ranged from 1.4 to 3.945 and 0.27 to 0.97,respectively;this tendency suggests that isolates are susceptible to *** AG groups showed a heterogeneous resistance to pencycuron and thiabendazole,being more tolerant to these fungicides AG1-1B and AG-11 *** genetic analysis shows a low genetic diversity among(P-value 0.3225)and within(P-value 0.3275)populations;this can indicate a clonal reproduction and little parasexual cycle among the analyzed isolations.

关键词： Anastomosis group genetic diversity genetic resistance Mexico PCR rfLP parasexual cycle REP PCR Wright’s statistics

6-8 Volume Production of HWR010 Cavities in IMP

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IMP & HIrfL Annual Report 2015年第1期 269-270页

作者： Yue Weiming Zhang Shenghu He Yuan Linac group 不详

The development of the Half Wave Resonator (HWR010) is based on the China ADS project. The HWR010 operates at 162.5 MHz and can provide more than 0.78 MV of accelerating voltage per cavity for proton with opt=0.10. The goal of the rf properties is to get a lower heat load and a higher accelerating gradient, which are determined by a higher R/Q0 and lower peak surface fields (Bpk/Eacc and Epk/Eacc). In order to optimize the HWR geometry parameters, CST-MWS is used to conduct the rf simulation. The optimized rf parameters are show in Table 1.

关键词： HWR010 Cavities IMP