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TimePix

The TimePix sensor is being integrated into the BL4S data acquisition system ready for the 2015 competition.

Development

Date Action
2015-04-20 Trying Pixelman on SLC6
2015-03-31 Meeting with TimePix experts Winnie and Erik
Possible Neutron converters applied to the sensor
FitPix USB readout card ~3000CHF
TimePix readout + Si sensor + wirebonding ~1000CHF
Data clock: 50MHz
14 bits per pixel

Mechanical

  • Mounting

Electrical

  • USB low voltage
  • FitPix frontend generates HV onboard
  • VHDCI/SCSI D68 chip to front-end connection

DAQ

  • FitPix USB full frame readout
  • FitPix specifications state there is an onboard timer with 20ns precision
  • Trigger response time listed as 70ns
  • Pixelman readout software
  • RasPix bundle - must use some serial protocol other than USB. 18fps output

Software

  • Pixelman Pixelman errors Close
    Pixelman_2013_04_08_SCL5> ./pixelman.sh 
    Checking FTDI Drivers permissions... OK.
    OpenJDK 64-Bit Server VM warning: You have loaded library /tmp/brooks/Pixelman_2013_04_08_SCL5/libjavawrapper.so which might have disabled stack guard. The VM will try to fix the stack guard now.
    It's highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'.
    java.lang.UnsatisfiedLinkError: /tmp/brooks/Pixelman_2013_04_08_SCL5/libjavawrapper.so: /tmp/brooks/Pixelman_2013_04_08_SCL5/libjavawrapper.so: wrong ELF class: ELFCLASS32 (Possible cause: architecture word width mismatch)
       at java.lang.ClassLoader$NativeLibrary.load(Native Method)
       at java.lang.ClassLoader.loadLibrary1(ClassLoader.java:1965)
       at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1890)
       at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1851)
       at java.lang.Runtime.load0(Runtime.java:795)
       at java.lang.System.load(System.java:1062)
       at cz.ieap.pixelman.jmpxloader.Main.initialize(Main.java:155)
       at cz.ieap.pixelman.jmpxloader.Main.main(Main.java:422)
    Pixelman_2013_09_25> ./pixelman.sh 
    Checking FTDI Drivers permissions... OK.
    OpenJDK 64-Bit Server VM warning: You have loaded library /tmp/brooks/Pixelman_2013_09_25/libjavawrapper.so which might have disabled stack guard. The VM will try to fix the stack guard now.
    It's highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'.
    java.lang.UnsatisfiedLinkError: /tmp/brooks/Pixelman_2013_09_25/libjavawrapper.so: /tmp/brooks/Pixelman_2013_09_25/libjavawrapper.so: wrong ELF class: ELFCLASS32 (Possible cause: architecture word width mismatch)
       at java.lang.ClassLoader$NativeLibrary.load(Native Method)
       at java.lang.ClassLoader.loadLibrary1(ClassLoader.java:1965)
       at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1890)
       at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1851)
       at java.lang.Runtime.load0(Runtime.java:795)
       at java.lang.System.load(System.java:1062)
       at cz.ieap.pixelman.jmpxloader.Main.initialize(Main.java:155)
       at cz.ieap.pixelman.jmpxloader.Main.main(Main.java:422)
    Pixelman_2013_09_25_x64> ./pixelman.sh 
    Checking FTDI Drivers permissions... OK.
    java.lang.UnsatisfiedLinkError: /tmp/brooks/Pixelman_2013_09_25_x64/libjavawrapper.so: /lib64/libc.so.6: version `GLIBC_2.14' not found (required by /tmp/brooks/Pixelman_2013_09_25_x64/libjavawrapper.so)
       at java.lang.ClassLoader$NativeLibrary.load(Native Method)
       at java.lang.ClassLoader.loadLibrary1(ClassLoader.java:1965)
       at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1890)
       at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1851)
       at java.lang.Runtime.load0(Runtime.java:795)
       at java.lang.System.load(System.java:1062)
       at cz.ieap.pixelman.jmpxloader.Main.initialize(Main.java:155)
       at cz.ieap.pixelman.jmpxloader.Main.main(Main.java:422)

Specification

  • Chip : Pixelated 300 μm Si detector chip (256 x 256 pixels, 55 μm pitch)
    Detection Ability
    Particle Type Energy Level Efficiency Comment
    Heavy charged particles >1MeV ~100 % Alpha, etc.
    Electrons (beta) >10keV ~100 %
    MIP particles > 1MeV ~100 % Under specific angle, e.g. muons from cosmic rays
    X-rays 5 kev -10 keV ~100 %
    X-rays 20 keV ~25 %
    X-rays 60 keV ~ 1 %
    Gamma-rays >1MeV ~ 0.1 %

Resources

The Timepix Manual is attached to this page.

Contacts

-- TimBrooks - 2015-03-13

Topic attachments
I Attachment History Action Size Date Who Comment
JPEGjpg TimPix.jpg r1 manage 737.2 K 2015-07-21 - 18:33 TimBrooks TimePix + FitPix USB readout module
PDFpdf Timepix_Manual_v1.0-1.pdf r1 manage 2551.4 K 2015-03-13 - 17:30 TimBrooks TimePix Manual from Winnie Wong
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Topic revision: r16 - 2015-07-21 - TimBrooks
 
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