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FADC Upgrade for SPring8TEXONO/KS
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40 MHz ; 12 bit ; 32 ch/module @ 9 U VME
[ c/f KS FADC : 20 MHz ; 8 bit ; 16 ch/module ]
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On-board processing with FPGA
1000 channels to be used in TPC in LEPS Expt. @ SPring8 by End 2002.
TPC for LEPS @ SPring8
Mixed signal FADC Adapter Board
40 MHz sampling rate.
10 bits resolution with 2Vp-p dynamic range.
Clock distribution with Phase Lock Loop circuit.
On Board digital signal delay and
Real-Time ZERO-Suppression.
High capacity First In First Out Memory.
Easy to use with high density connector
.
Prototype Measurements :
(cosmic muon)
ROOT Offline Event Display for
2 SPring-8 FADC (64 channels)
Module 1
Module 2
SY1527
Universal Multichannel Power Supply System
- Houses up to 16 boards (HV/LV or "branch controllers")
- Ad-hoc boards and peripheral systems
-Communications via RS232, H.S. CAENET,
CERN-approved fieldbuses and TCP/IP
- OPC Server to ease integration in DCS
- Programmable handling of parameters and errors
- Optical links for remote communications
- Fast, accurate setting and monitoring of channel parameters
- Sophisticated channel trip handling
- Multilevel management of user profiles
- Live insertion of boards
- Modular and expandable power supply
- Secure access to the system via Intranet
- Remote debugging and technical support
- Easy firmware upgrading
Overview
The Model SY1527 is the fully equipped large scale experiment version of the latest CAEN
UNIVERSAL MULTICHANNEL POWER SUPPLY SYSTEM. This system outlines a completely
new approach to power generation and distribution by allowing to house, in the same mainframe,
both ordinary HV/LV boards and branch controllers, where the latter are used to control other
remote generators and distributors.
Modularity, flexibility and reliability are the keypoints of its design, enabling this module to meet
the requirements of a wide range of experimental conditions. The latter range from those of LHC
experiments, in which the model's features find prior application, to those of other less
challenging, but still demanding, High Energy Physics experiments.
The User interface features the usual friendliness of the previous CAEN systems which now also
includes a 7.7" colour LCD. A wide choice of interface facilities provides full communication
compatibility with the previous systems and the feasibility of controlling heterogeneous external
devices.
Modularity has been one of the leading criteria in the design and development of the system: the
internal power supply allows different configurations supporting up to 2250 Watts per mainframe,
while up to 16 boards can be housed in the mainframe to fulfil different functions. These boards
will include a new line of High and Low voltage boards analogous with those presently available
for the SY527 system.
A1733
12 Channel 3 kV/3 mA, 4 kV/ 2 mA Board
Overview
The Mod. A1733 is a single width board housing 12 HV channels with either positive
(A1733P) or negative (A1733N) polarity.
The Mod. A1733 output channels have 3 kV / 3 mA or 4 kV / 2 mA full scale range
(dip-switch selectable).
12 channel HV boards
- Dual range 4/3 kV output voltage
-2/3 mA current full scale
- Available with positive or negative polarity
- 0.25 V Voltage Set / Monitor resolution
- 200 nA Current Set / Monitor resolution
- Voltage ripple smaller than 30 mV pp
If the output voltage differs from the programmed value by more than 3% of voltage
full scale range, the channel is signalled to be either in OVERVOLTAGE or
UNDERVOLTAGE condition. Moreover, for each channel, a voltage protection limit
SVMAX can be fixed via software with 1 V resolution and the output voltage can not
be programmed beyond this value.
The HV RAMP-UP and RAMP-DOWN rates may be selected independently for
each channel in the range 1÷ 500 V/s in 1 V/s steps.
- Programmable TRIP parameter
- 1÷500 Volt /sec programmable Ramp Up/Down
The output current is monitored with 200 nA resolution; if a channel tries to draw a
current larger than its programmed limit it is signalled to be in OVERCURRENT
condition; the SY1527 system detects this state as a fault and reacts according to
the setting of the TRIP parameter, namely:
1)TRIP=infinite ( = 1000 s)
The output current is permitted to exceed the programmed limit; if the maximum
output current value is reached the channel behaves like a constant current
generator.
2)TRIP=finite (< 1000 s)
The output current is permitted to exceed the limit only for programmed time interval
and then is switched off.
The TRIP time (i.e. the maximum time an OVERCURRENT condition is allowed to
last) can be programmed in 0.1 s steps.
The maximum output voltage (VMAX Hardware) can be fixed, through a
potentiometer located on the front panel, at the same common value for all the
board channels and this value can be read out via software.
The boards are provided with an "HV EN" input that disables the channels when it is
not connected to ground.
Total :
EURO 48630 (~1.7 M NTD)
Request NSC support 800k NTD
ASIoP Matching 900k NTD
北京串列加速器核物理国家实
验室
束流申请表（2003 年度）
一、简表
项目名称：用加速器质谱技术测定中微子探测器材料中的放射性杂质
起止时间：从 2000 年到 2003 年 负责人姓名：王子敬，何明
所在单位：台北市，中研院物理所
联系电话：886-2-27899682
通讯地址：台湾台北市南港区11529，中研院物理所
□
项目性质：（在小格内画勾）973项目
□
国家自然科学基金
□
X
部、省（市）科学基金
国防预研
□
□
国防基础
□
研究探索
硕、博论文
在原子能院的合作联系人姓名：姜山
参加者
单位
参加者
单位
参加者
单位
邓炳坤
中研院物理所
姜山
原子能院
周祖英
原子能院
李浩斌
中研院物理所
懂克君
原子能院
李金
高能所
何明
原子能院
唐洪庆
原子能院
申请束流时间： 150小时
束流种类
实验靶站：L20
靶上最小
束流（nA）
能量（MeV）
用束时间（小时）
日期
39, 40K,
I
80
20
80
6月
39, 40K,
I
80
20
70
11月
二、摘要 (对新开项目请写意义、主要内容及目标；对继续执行
项目请写今年实验内容与结果)，（不超过400字）。
2001年，通过合作研究，在中国原子能科学研究院的HI-13串列
加速器的AMS装置上首次（国际上首次）测量了中微子探测器材料
CsI中长寿命超底含量的放射性杂质 129I和40K的含量。主要的测量结
果是：（1）CsI中129I与127I的原子比值为1×10-12（129I在CsI中大约
为5×10-13g/g）；（2）CsI中39K与127I的原子比值大约为6×10-6（相
当于CsI中的40K约为1.7×10-10g/g）。
上述的结果是一个初步的测量结果，尤其是对 39 K的测量存在两
个问题，一是测量本底问题，测量结果中存在有来自离子源（包括
，靶锥和Cs+ 束）的本底；二是K离子的引出效率与传输效率问题。
这两个问题将在2003年进行研究。
三、三年内在串列上取得的成果登记（1论文，按作者、题目、刊物、期、
年和页；2国际会议报告，按会议、日期、地点、作者、题目；3获奖及专利。）
本計劃乃新的研究方向，為國際上首次，於2001年已有初步結果，並未在國際期刊
發表。於2003年的重點，就是把結果確認，瞭解系統誤差、效率等問題，然後定可
於一流期刊發表。
本合作團隊於2000年作中子對CsI nuclear recoil 的測量，獲得良好數據，發表於
“Nuclear Recoil Measurement in CsI(Tl) crystal for Cold Dark Matter Detection”,
M.Z. Wang et al., Phys. Lett. B 536, 203 (2002)