*Activities in WuhanTopMetal sensor & ALICE ITS upgade Xiangming SunCCNUALICE ITS Upgrade and O2 Asian Workshop 2014

*outlineTopMetal sensor design test & applicationALICE ITS sensor : temperature sensor ALICE ITS test and assembly : infrastructure & pattern recognizatiomALICE ITS readout : SRU & UDP+TCPsummary

*The idea of TopMetal sensor silicon isn't the ideal detector material

the readout chip of hybrid detector can be used like a independent detector

*the top layer metal opento the air, collecting charge drifted to itTopMetal structuredirect collecting chargecoupled with other type of detectorsadvantageTopMetal sensor

*topmetal waferTopmetal microscope picture pitch 80umTopMetal wafer

*TopMetal test setup

*TopMetal testpeak: resetred lineno sourceblack sourcewith sourceSourceAm2415.4MeV alphabottom leftcharge burst

*Beam monitorintegration time1msbeam current1pAresolution

Beam monitor in air13.5MeV proton from Cyclotron; 20nA over 3x3 inch areaCollimated with a pinhole, as small as 0.1mm diameter

Beam test at the 88 cyclotron, LBNL

Beam test at the 88 cyclotron, LBNL

*Beam test at the 88 cyclotron, LBNLBeam curent 20fA

*Beam test at the 88 cyclotron, LBNL

*ALICE ITS upgradeALICE ITS sensor : temperature sensor ALICE ITS test and assembly : infrastructure & pattern recognizatiomALICE ITS readout : SRU & UDP+TCPsummary

**ALICE ITS sensorLayout view28 mPriority encoder Analog frontendreadout and OrthoPix

sensor design2 student

single pad temperature sensor 11 pad digital signal2power consumption ~5uA(working) ~1pA(idle)3FPGA directly connect to the pad Temperature sensor Temperature sensor on the chip gives real-time temperature to 1, show the relation between cooling and power consumption2, calibrate the sensor performance on different temperature

diode+slope+comparatorTemperature sensor structure

1FPGA send rising edge to pad. The circuit starts while FPGA dirve the pad to high impedence mode. as the circuit starts, the slope voltage will pass the diode voltage on the input of the comparator, the comparator will drive the pad to low. 2FPGA count the time betweet the rising edge and falling edge to the diode voltage. Temperature sensor testbench

-40-85resolution: 0.0858um*44um (.35um)Temperature sensor performance

*ladder assembly ladder testmodule assembly module test

ALICE ITS test and assembly

*Test and assembly infrastructure150 square meters clean room50 square meters machining shopsimple modeling carbon fiber

*Pattern recognizatiom1,using camera or microscope to take picture.2,analysing the picture to get the position and orientation of the sensor 3,control the movement of probe station or precision rail to act on the sensor

probe test the sensorassembly the sensor to laddersaving labor higher precisionmore time to train the code

*openCV + root software environment in windowsWith PC camera now; installing camera on rail system is the next stepPattern recognizatiom

*ALICE ITS readoutFor digital data transmission only

1,SRU (from digitized point to RORC) 2,UDP+TCP solution (from digitized point to either net card;No DDL included)

*UDP+TCP solutionthe same function like DDLhigher speed 10Gb/channelindustry standard; update with industry compatible to routerFPGA xilinx K7; board KC705cheaper and simpler in construction

*works on LBL beam monitor testUDP part has some problem in frimware yet

UDP+TCP solution

*summaryTopMetal sensor can be used in beam monitor

temperature sensor pattern recogizatiomUDP+TCP

For both 1mm hole, stage moved by 2mmStage moved by 1mm