The CLEO-c Detector该cleo-c探测器-PPT精品文档
核与粒子物理实验方法4-1气体探测器
基于此要求，通常选择惰性气体，如氩气、氙气等。入射粒子在其中主要以电离 和激发工作气体原子损失能量。被激发的惰性气体退激发只有通过发射光子。对于Ar 原子，其发射光子的能量为11.6 eV。这一能量是高于金属原子的电离阈的，如Cu原子 的电离阈为7.7 eV。因此这些光子轰击到探测器极板或丝上就会产生电离而造成连续 放电而使探测器无法正常工作。
• 多丝正比计数器
多丝正比计数器是Charpak及其合作者于1968年设计出来的一种位置探测器，简称 MWPC (Multi-Wire Proportional Counter)。因该探测器在粒子物理实验研究中的重要作 用，Charpak于1992年获得了诺贝尔物理学奖。
最简单的MWPC是由两个阴极面和位于其中间的一个阳极丝平面组成的，工作在 正比区，其每一根丝类似于一个单丝正比计数器。下图为一个典型的多丝正比计数器 的结构示意图。
➢ 采用延迟时间差的方法 ➢ 一个阳极丝平面＋2个分条阴极平面
MWPC的应用
➢ 一般MWPC用于粒子物理实验中，用于探测最小电离粒子的径迹。此时，工 作气压在1个大气压或以上（为了获得足够多的初电离电荷以提高探测效 率）。
➢ MWPC也用于低能重离子物理中，用来探测重碎片。此时一般工作在低气压 状态，工作气体的压力一般在几十个mb以下。
E N prim Wi
即，收集的电荷数正比于粒子在其中的能量损失。下图给出了几种常用气 体产生的原初电离对的数目（对应最小电离粒子）和平均电离功。
主要用于探测 低能带电粒子
电离室产生信号量级的估算
阴极
d
接地 R
＋V
入射粒子 ＋–＋–＋– x
0
信号引出 0
The CLEO-c Detector该cleo-c探测器
85% of 4p For p>1 GeV
The CLEO-c Detector
8/11/2019
CLEO III
M a c in to s h P IC T U(4S) Typical im a g e fo rm a t Hadronic Event • 10 tracks
is n o t s u p p o rte d • 10 showers
January 13, 2004
The CLEO-c Detector
8/11/2019
RICH Detector
M acintosh PICT im age form at
is not supported
January 13, 2004
The CLEO-c Detector
8/11/2019
January 13, 2004
January 13, 2004
The CLEO-c Detector
Endcap repackaged Pushed back ~7 cm
8/11/2019
CsI for CLEO III & CLEO-c
• Barrel unchanged from CLEO II
– But DR/Particle ID changes increase minimally obstructed barrel from 70% to 80% of 4p
CsI Calorimeter
• Projective Barrel
• Endcaps
• 4 photodiode readout
M a c in to s h P IC T • Triple range ADCs • Excellent – Photon finding
c Gamma
2
5 University of Illinois, Urbana-Champaign, Illinois 61801 6 Carleton University, Ottawa, Ontario, Canada K1S 5B6
and the Institute of Particle Physics, Canada 8 Ithaca College, Ithaca, New York 14850 9 University of Kansas, Lawrence, Kansas 66045 10 University of Minnesota, Minneapolis, Minnesota 55455 11 State University of New York at Albany, Albany, New York 12222 12 Ohio State University, Columbus, Ohio 43210 13 University of Oklahoma, Norman, Oklahoma 73019 14 Purdue University, West Lafayette, Indiana 47907 15 University of Rochester, Rochester, New York 14627 16 Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309 17 Southern Methodist University, Dallas, Texas 75275 18 Syracuse University, Syracuse, New York 13244 19 Vanderbilt University, Nashville, Tennessee 37235 20 Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061 21 Wayne State University, Detroit, Michigan 48202 22 California Institute of Technology, Pasadena, California 91125 23 University of California, San Diego, La Jolla, California 92093 24 University of California, Santa Barbara, California 93106 25 University of Colorado, Boulder, Colorado 80309-0390
EPOCH 6LT 一手操作型缺陷探测器说明书
Elevate Your InspectionsFlaw DetectorEPOCH 6L TEPOCH ®6LT Portable Flaw DetectorThe EPOCH ® 6LT flaw detector combines ruggedness and ease of use in an instrument designed to be operated using only one hand, enabling fast, efficient rope access inspections and maximum uptime.Designed for Rope Access Technicians• Free Up Your Hands: Attach the instrument to your leg or harness and keep your hands free to scan for flaws and maintain balance • Comfortable: Weighs just 1.95 pounds (890 g) with a grip-oriented weight distribution for one-handed operation with minimal wrist fatigue • Easy to Use: Rotary knob and simple button design make it easy for users to navigate the menu and adjust parameters using just their thumb, even while wearing gloves• Clear, Bright Screen: Transflective 640 × 480 pixel display with outdoor mode helps make A-scans clear in difficult lighting conditions • Tough and Reliable: Engineered to IP65/67 for dust and water resistance and drop tested to protect against the hazards found in rope access inspection environmentsHarness the Power of PortabilityNo Compromises Don’t compromise on the inspection capabilities of your flaw detector. Now, inspectors who work in rope access applications can take advantage of the functionality they need in an instrument that attaches to their leg or harness for hands-free operation.Combine the EPOCH ® 6LT flaw detector with the rope access accessory kit for added functionality that helps keep rope access technicians safe during challenging inspections. The instrument fits snugly in a protective soft case that can besecurely attached to a user’s leg with the included strap or fastened to the user’s harness connection points with adjustable safety leads. However you attach it, the kit keeps the instrument in a comfortable, secure viewing position.With the unit secured, it’s easy to make parameter adjustments with one hand, leaving the other hand free to manipulate the transducer or maintain balance and personal safety. The display rotates to portrait or landscape mode for optimalA-scan viewing while the knob and buttons remain readily accessible for quick adjustments. If you’re working in a hazardous environment, add an optional screen cover for additional protection.The workflow of the EPOCH ® 6LT flaw detector is simple and straightforward. The primary screen is a large, optimized A-scan display that contains links to commonly used features and functions. Combined with an improved scanning workflow, users can complete their inspections with minimal button presses and adjustments. When you do need to navigate the menu, prominent icons make it easy to find the feature you’re looking for.Despite its small size, the EPOCH 6LT flaw detector meets the requirements of nearly any conventional ultrasonic inspectionapplication and includes additional functionality for expanded connectivity.More Functionality on the Go• Intuitive Navigation: Two-screen, icon-based interface • Optimized for One-Handed Operation: Hardware and software maximize efficient one-handed operation • Advanced Flaw Detection Capabilities: All the corefunctionality of the EPOCH 650 flaw detector and meets the requirements of EN12668-1:2010• Fast Corrosion Defect Scanning: Optional corrosion software combines the ease of a thickness gage with the flexibility of a flaw detector and includes center-pin transducer ID for faster set up • Stay Connected: Optional wireless LAN (Wi-Fi) connectivity for on-the-go data backups, setup downloads, efficient fleet management, and powerful applications through the OlympusScientific CloudRope Access Inspection Applications Powerful Corrosion and Flaw Inspection SoftwareCorrosion ModuleWith the optional corrosion module, get the best of thickness measurement and UT corrosion scanning in one instrument.Get accurate measurements from the software’s thickness measurement algorithm, true V-path correction that accounts forthe angle of dual element transducers, and ‘do zero’ that compensates for wear on the transducer’s contact plate.For speed and efficiency, the software enables the use of thickness gage transducers, making it easy to add a flaw detectorto your fleet of instruments. With automatic probe recognition, the software recognizes and automatically configures theinstrument for that probe. Likewise, when the AGC feature detects the probe’s signal, it optimizes the gain for optimalthickness measurements. Once the user begins their corrosion scanning, the grid view feature makes it easy to savethickness measurements onboard the instrument rather than having to manually record readings.Efficient Data Management• Compatible with GageView® Pro PC interface program• Export files via Wi-Fi or transfer to a removable USB memorystick• Supports bitmap (BMP), comma-separated value (CSV), andPDF file formatsConnected and Cloud EnabledThe EPOCH® 6LT flaw detector features cloud connectivity. Connect your flaw detector to the Olympus Scientific Cloud for powerful cloud-based tools, including:• Wireless firmware upgrade• File backup and archiving• Remote file access and managementCloud file management includes all EPOCH 6LT file types, as well as exported report formats and image files. This remote data sharing capability makes it easier than ever to report and communicate your inspection results.Standard Software Features• Dynamic DAC/TCG: compares echo signals to a DAC curve or reference echo• DGS/AVG: compares echo signals to a DGS/AVG diagram Added Versatility:Optional Software Features• AWS D1.1 and D1.5: Provides a dynamic indication rating for AWS inspection applications• Back Wall Echo Attenuator: Attenuates the back wall of an inspected part using the screen region defined by Gate 2Offshore Platform InspectionsWith an innovative corrosion software option and a comprehensive setof weld-related support features, corrosion scanning is fast and efficient, even while suspended above the ocean from a rope.Corrosion Module Features• Automatic probe recognition andconfiguration with center pin ID• Dynamic toggle between flaw scanning and high precision spot measurementmodes• Automatic Gain Control (AGC)• Thickness gage high precisionmeasurement algorithm• Automatic zero function (‘do zero’)• Grid view for data visualizationWeld Flaw Detectionand Sizing Features• DAC/TCG• DGS/AVG• AWS D1.1/1.5 weld rating calculator In-Service Wind TurbineInspectionWhether you’re inspecting the weldedjoints of a wind tower or compositeturbine blades, the EPOCH® 6LT flawdetector is up to the challenge.• PerfectSquare™ tunable square wavepulser• Digital high dynamic range receiver• Eight 100% digital filter sets, includinglow frequency bandwidth support• Pulser voltage up to 400 V• DAC/TCG and DGS/AVG softwarefunctionality includedBridge and StructuralSteel InspectionsThe EPOCH 6LT flaw detector offersall of the necessary features for bridgeand structural steel inspections,including an optional AWS D1.1/1.5weld rating calculator. Other featurerequirements, such as DAC/TCG andDGS/AVG, are included with everyEPOCH 6LT flaw detector.• PerfectSquare tunable square wavepulser• Digital high dynamic range pulser/receiver• Eight 100% digital filter sets• Pulser voltage from 100 V to 400 V• Five customizable digital measurementsStandard Flaw Sizing Software• DAC/TCG• DGS/AVGis certified to ISO 9001, ISO 14001, and OHSAS 18001.EPOCH ® 6LT SpecificationsGeneralUser Interface Languages English, Spanish, French, German, Japanese, Chinese, Portuguese, Russian, Italian Transducer connections LEMO 00Data storage 100,000 IDs onboardBattery type and life Single lithium-ion rechargeable standard; 6 h life Power requirements AC Mains: 100 VAC to 120 VAC, 200 VAC to 240 VAC, 50 Hz to 60 HzDisplay typeFull VGA (640 × 480 pixels) transflective color LCD, 60 Hz update rateDisplay dimensions (W × H, Diag.)117 mm × 89 mm, 146 mm (4.62 in. × 3.49 in., 5.76 in.)Overall Dimensions (W × H × D)209 mm × 128 mm × 36 mm, 58 mm at the hand grip (8.2 in. × 5 in. × 1.4 in., 2.3 in. at the hand grip)Weight890 g (1.95 lb.), including lithium-ion batteryInstrument Inputs/Outputs USB ports (1) USB 1.1 Full Speed Host (Type A)(1) USB 2.0 Full Speed Client (Type Mini B)Video output1 digital video outputEnvironmental Ratings IP ratingIngress Protection (IP) engineered to IP67 (dust tight and water submersion) and IP65 (dust tight and water jets) per IEC 60529-2004 (Degrees of Protection provided by enclosures—IP Code).Explosive atmosphere MIL-STD-810F, Method 511.4, Procedure 1.Shock tested MIL-STD-810F, Method 516.5, Procedure I, 6 cycles each axis, 15 g, 11 ms half sine.Vibration tested MIL-STD-810F, Method 514.5, Procedure I, Annex C, Figure 6, general exposure: 1 hour each axis.Operating temperature -10 °C to 50 °C (14 °F to 122 °F)Battery storage temperature 0 °C to 50 °C (32 °F to 122 °F)Pulser Pulser Tunable square wavePRF10 Hz to 2000 Hz in 10 Hz increments Energy settings 100 V, 200 V, 300 V, or 400 VPulse width Adjustable from 25 nsec to 5,000 nsec (0.1 MHz) with PerfectSquare ™ technology Damping 50, 400 ΩReceiver Gain0 to 110 dB Maximum input signal 20 Vp Receiver input impedance400 Ω ± 5%Receiver bandwidth DC to 26.5 MHz at -3 dB (standard version)0.2 to 26.5 MHz at -3 dB (EN12668 compliant version)Digital filter settings8 digital filter sets (standard version)7 digital filter sets (EN12668 compliant version)Rectification Full-Wave, Positive Half-Wave, Negative Half-Wave, RF System linearity Horizontal: ± 0.5% FSWResolution 0.25% FSH, amplifier accuracy ± 1dB Reject0 to 85% FSH in 1% increment positions Amplitude measurement 1.25% to 110% full screen heightMeasurement rate Equivalent to PRF in all modes (single shot)CalibrationAutomated calibrationVelocity, zero offsetStraight beam (first back wall or echo-to-echo)Angle beam (sound path or depth)Test modes Pulse echo, dual, or through transmission Units Millimeters, inches, or microsecondsRange 4.31 mm to 6,700 mm at 5,900 m/s (0.2320 in./μs)Velocity 635 m/s to 15240 m/s (0.0250 in./μs to 0.6000 in./μs)Zero offset 0 to 750 μsDisplay delay -10 microseconds to 2203 microseconds Refracted angle 0° to 85° in 0.1° increments, then jump to 90°GatesMeasurement gates 2 fully independent flaw gates Gate start Variable over entire displayed rangeGate width Variable from 0.040 microseconds to end of displayed rangeGate heightVariable from 2 to 95% full screen height in 1% incrementsAlarmsPositive and negative threshold/curve, minimum depth (gate 1 and gate 2)MeasurementsMeasurement display locations 5 locations available (manual or auto selection)Gate (1, 2)Thickness, sound path, projection, depth, amplitude, time-of-flight, min./max. depth, min./max. amplitude, sizing measurements based on mode Echo-to-echo Standard gate 2 – gate 1DAC/TCGStandard, up to 50 points, 110 dB dynamic TCG rangeSpecial DAC modes Custom DAC (up to 6 curves), 20–80% view Curved surface correctionStandard OD or bar correction for angle beam measurementsSoftware OptionsEP6LT-AWS (Q1400007):AWS D1.1/D1.5 weld rating calculatorEP6LT-CORRSN (Q1400008): Corrosion moduleEP6LT-BEA (Q1400009): Back wall echo attenuation gateOptional AccessoriesBATT-10025-0024 (Q7600001): Lithium-ion rechargeable battery EP-MCA-X :EPOCH series charger / adaptor with power cordHNDL-10018-0001 (Q7790068): EPOCH 6LT wrist strapEPLTC-C-USB-A-6 (U8840031): USB cable, mini A to mini BCASE-10042-0001 (Q7640003): EPOCH 6LT transport case 600-DP (U8780297):Display protectors (10 pack)EP6LT-KIT-ROPE (Q7790069): EPOCH 6LT rope access accessory kitEP4/CH (U8140055):EPOCH series chest harness EP6LT-STAND (Q7790070): EPOCH 6LT desktop stand EPXT-EC-x :EPOCH series external charging base with power cord。
【精品】SmokeDetector烟雾探测器（学习资料）
Product information产品信息ORS 142 optical smoke switchORS142型号感光烟雾探测器●Optical smoke detection感光烟雾探测● contamination warning杂质报警● Auto contamination compensation杂质自动补偿● Communications capability通信能力● Sensing chamber monitoring感应室监测●NC volt-free contact数字控制无压触点The ORS 142 operates on the light scatter principle. Inside the sensing chamber a light source and a light sensor are arranged so that the light normally does not fall on the sensor. It is only when airborne particles enter the chamber that light is scattered onto the sensor. The ORS 142 electronic circuitry also monitors the smoke detection system for slight contamination (dust and dirt build-up), heavy contamination and faults (sensing chamber failure). LEDs provide an optical indication of the operating status of the ORS 142. A long-term compensation function automatically maintains a constant difference between the quiescent signal and the alarm threshold, until a set limit indicating heavy contamination is reached. A relay contact opens in the alarm condition or on power failure.ORS142感光烟雾探测器根据散射光原理运行。
人教八年级上册 Unit4 ScectionA 1a-2c 讲课课件(共19张)
Pre- listening
Look at the pictures and answer the questions.看课本图片，回答问题 。
1.Where are the two boys in picture 1?
new movies
popular
Pre-listening
Names of movie theaters.
Screen City TToowwnnCCininemema/aTC
MMoovvieieWWorolrdl/dMW
Abbreviate 缩写
Screen City/SC listening strategy听力策略
AB::WSuhraet.’s the best restaurant in oAur: Wtowhant’?s the best clothing store B: Iitnhtionwkn…? is the best.
B: I think … is the best… .
AA: :WWhhyy?do you think so? BB: :BItechaaus s…e…it…W…hat.’s the worst…
the most delicious food
the cleanest
is
the most popular/boring
the cheapest/most expensive
Post-listening
2c Role-play
A: Hello! I’m a reporter. Can I ask you some questions?
洛雷克C21-CRT实时观测系统说明书
ww w.l o r e x c c t v.c o mMonitorHigh resolution (480 TV Lines) 21” Color Real Time quad monitor (30 fps) with built-in Digital Video Recorder ‘Plug & Play’ USB computer interface provides remote viewing via the internet*View up to 4 Camera Locations in Real Time (30fps) simultaneously Built-in Multiplexer FunctionDual Motion Sensing Function Camera & Pixel based sensing activity Playback recorded video in Quad or Full Screen On-Screen programming: date*time*camera Digital freeze with two time zoom capabilityFull screen or picture-in-picture sequential camera option Standby power switch enables monitor to be turned off while recording Multi-voltage system 100-240 volts Selectable dwell timeRemote Control or Main Panel operation Two-way audio**Alarm inputs to add additional alarm devicesOne alarm output to connect monitor to optional recording devicesDVR3 Record video settings (Normal, High & Best)7 Selectable recording time selections Event list displays camera activity Security Password protected Supports 20 - 250 GB HDDHigh Quality Recording with Modified MJPEG Compression (5~20K byte/frame)Digital Recording and Playback allows for instant retrieval of recorded imagesßßßßßßßßßßßßßßßßßßßßßßßF E A T U R E SSG21CD7444UQ-A80CAMERAProfessional Grade, Weather Resistant*** Cameras with CCD Image Sensors 3 x 1/4” CCD Color Cameras/ 1 x 1/4” CCD Color Dome CameraBuilt-in speaker and microphone to allow for two way audio communication (observation camera) one way audio (dome camera)Mounting Bracket includedßßßßS P E C I F I C A T I O N S :D I ME N S I O N S :Monitor©2007 Lorex Technology Inc.As our product is subject to continuous improvement, Lorex Technology & subsidiaries reserve the right to modify product design, specifications & prices without notice andwithout incurring any obligation. E&OE3700 Koppers Street, Suite 504Baltimore, Maryland 21227,USA.Lorex Technology Inc.300 Alden Road, Markham, Ontario L3R 4C1Canada.0-18012007Monitor:Picture Tube: 21” Color (diagonal)Horizontal Resolution: More than 480 Lines Camera capable: 4 (DIN / BNC)Audio inputs: 4 RCA Quad Speed: 30 fps Alarm Inputs/Outputs: 4/1Input signal: 1 V p-p at 75 ohms terminated Power source: Multi-voltage (100-240 volts)Power Consumption: 105 watts Operation Temperature: 41°F - 104°F Weight: 57 lbs (26 Kg)Color:GreyDVRHard Disk Storage: IDE Type, UTMA 66 aboveVideo Compression: Modified MJPEG (5~20Kbyte/frame)HDD:Default 80 GB (User optional)Video Resolution: 720 x 480Recording Resolution: 640 x 224Record Modes: Alarm / External / Timer / Manual Alarm history log: 1000 events Security Protection: Password protection Display refresh rate: 60 ips Record refresh rate:60 ips* Broadband Internet Service Recommended** Dome Camera supports only listen-in audio at the monitor ***Not recommended for direct exposure to water, rain or snow.Observation CameraImage Device: 1/4” CCD Picture Elements: 510 H x 492 V Lens: 3.6 mm Resolution: 350 TV Lines Illumination: ***********Power Requirement:powered from monitor via cable Operating Temp:14F to 113F (-10°C ~ +45°C)Dome CameraImage Device: 1/4” CCD Picture Elements: 510 H x 492 V Lens: 3.6 mm Resolution:350 TV Lines Illumination: ***********Power Requirement: powered from monitor via cable Operating Temp: 14F to 113F (-10°C ~ +45°C)Operating Humidity:90% RH max.B AC k j A C k P A N E L :BNC Video inputs/looping outputDIN camera inputsAudio inputsUSBP R O D U C T I N F O R M A T I O N :Model#:SG21CD7444UQ-A80Weight:64 lbs /29 kgsPackage Dimensions:21.5 X 26” X 22” / 546m X 660mm X 558mm (W x H x D)UPC:7-78597-07444-4Package Cube:7.11ft / 0.192m。
紫外探测器ppt课件
1.热探测器
1.2.金属和半导体热敏电阻测辐射热计： 这是利用某些金属或半导体材料的电 阻率随温度有较大变化而制成的探测器。 当吸收紫外辐射而温度升高时，金属的电 阻率增加(即电阻率温度系数为正)；半导体 电阻率则降低(温度系数为负)。根据电阻变 化的大小可以测出被吸收的紫外辐射功率。
1.热探测器
900 8.9
-
紫外探测器的性能参数
紫外探测器的主要参数包括：
1.暗电流 2.光电流 3. 量子效率
4.响应度
5.响应时间
1.光谱响应特性
当不同波长的光照射探测器时，只有能量满足一定条件的
光子才能激发出光生载流子从而产生光生电流。对于半导体材 料，要发生本征吸收，光子能量必须大于或者等于禁带宽度，
点，适合于制作抗辐射、高频、大功率和高密度集成的电子器件；而
利用其特有的宽禁带，还可以制作蓝、绿光和紫外光的发光器件和光 探测器件。
半导体材料的特性对比
Si和GaAs 材料 宽带隙半导体材料
Si
带隙类型 禁带宽度 (eV) 熔点 (℃) 热导率 (W/cm•K) 间接 1.119 1420 1.40
对于GaN材料而言，Eg=3.4eV，则GaN探测器的长波限 λ0≈365nm。 对于4H-SiC材料，Eg=3.26eV，则其长波限λ0≈380nm 。
从计算结果可以看出， GaN 、 4H-SiC 材料的本征吸收
长波限都在紫外区。
2.量子效率
内量子效率定义为入射至器件中的每一
个光子所产生的电子-空穴对数目，即：
GaAs
直接 1.428 1238 0.54
SiC
间接 2
GaN
直接 3.36 1700 1.5
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Trigger: Tracks & Showers Pipelined Latency = 2.5ms
Data Acquisition: Event size = 25kB Thruput < 6MB/s
January 13, 2004
85% of 4p For p>1 GeV The CLEO-c Detector 2/27/2019
2/27/2019
M acintosh PIC T im age form at
January 13, 2004 The CLEO-c Detector 2/27/2019
Drift Chamber
• • • • • • Coordinated with IR 9796 sense wires 14 mm square cell 16 inner axial layers 31 stereo layers Outer cathode segmentation
• Large 93% DW
– Nearly hermetic
• Full-range Particle ID • Simulate Alternatives • Coordinate with Storage Ring
The CLEO-c Detector 2/27/2019
January 13, 2004
• • • • •
High Luminosity High Statistics Systematics Dominate Rare Decays Backgrounds Matter
– Fakes – Feed-down – Combinatorics
• Quality Tracking AND Precision EM Calorimetery
January 13, 2004
The CLEO-c Detector
2/27/2019
ZD – Inner Drift Chamber
• 6 stereo layers:
– r=5.3 cm – 10.5 cm – 12-15o stereo angle – |cos q| < 0.93
• • • • • •
The CLEO-c Detector
Steve Gray Cornell University BESIII Workshop January 13, 2019
January 13, 2004 The CLEO-c Detector 2/27/2019
New Era -> New Needs
• Expect • Need
2/27/2019
ZD Drawing
M a c in to s h P IC T im a g e fo r m a t is n o t s u p p o r te d
January 13, 2004 The CLEO-c Detector 2/27/2019
January 13, 2004
300, 10 mm cells 1% X0, .8mm Al inner tube 60:40 Helium-Propane 20 mm Au-W sense wires 110 mm Au-Al field wires Outer Al-mylar skin
January 13, 2004
The CLEO-c Detector
50 -8
• MC agreement • Momentum Resolution
– dp/p=0.7% at 5 GeV/c – dp/p=0.3% at 1 GeV/c – MS limited < 1.5 GeV/c
• dE/dx resolution
– 5.7% at min Ionizing – K–p sep. at rformance
DR3 All Layers Residual (mm) • Avg. residual 85 mm
– Best 65 mm
M 150a c in to s h P IC T im a g e fo rm a t 100 is n o t s u p p o rte d
CLEO III -> CLEO-c
1.5 T now,... 1.0T later 93% of 4p sp/p = 0.35% 1GeV dE/dx: 5.7% p minI
83% of 4p 87% Kaon ID with 0.2% p fake 0.9GeV
93% of 4p sE/E = 2% 1GeV = 4% 100MeV
– Dz=1 cm; Df=2p/8
• Thin Inner Tube
• 60:40 HeliumPropane
January 13, 2004 The CLEO-c Detector 2/27/2019
– 0.12% X0
January 13, 2004
The CLEO-c Detector
2/27/2019
-4 0 4 Drift Distance (mm)
8
January 13, 2004
The CLEO-c Detector
2/27/2019
ZD – Inner Drift Chamber
• Charm -> lower momentum spectrum • Multiple scattering limited dp/p • No vertexing needed • Replace silicon with low-mass Z tracker • Similar mass resolution • More layers - better track recognition
M acin to sh P IC T im ag e fo rm at is n o t su p p o rted
January 13, 2004 The CLEO-c Detector
CLEO III U(4S) Typical Hadronic Event • 10 tracks • 10 showers
The CLEO-c Detector