1 / 17

Noise in the irradiated FE-I4-B versus temperature

Noise in the irradiated FE-I4-B versus temperature. A.Rozanov , F.Bompard (CPPM). Outlook. Conditions Digital tests Analog test P roblem with f reezing FE-I4 output. Conditions. Single board FE-I4-B sn 165 in lab 892-S-D19

ilario
Download Presentation

Noise in the irradiated FE-I4-B versus temperature

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Noise in the irradiated FE-I4-B versus temperature A.Rozanov, F.Bompard (CPPM) A.Rozanov FE-I4 tests 29.07.2013

  2. Outlook • Conditions • Digital tests • Analog test • Problem with freezing FE-I4 output A.Rozanov FE-I4 tests 29.07.2013

  3. Conditions • Single board FE-I4-B sn 165 in lab 892-S-D19 • Irradiated in 2012 at CERN PS with 24 GeV protons close to the region of end of columns at 400 MRads • Chip configuration: FEI4b.irradiated.chip.165.tuned.3000e.TOT8.cfg.root from 17.04.2013 (tuning made by Maurice Garcia) • USBpix board with grey flat cable to single chip board • Typical consumption: Vdda=2.5v Idda=430 mA, Vdd=2.5v Iddd=181 mA on external power supply • STControl version in MARNACHE from directory release-3.3/bin/STcontrol.exe from 08.03.2013 • Temperature regulated inside the freezer FARK 3130A with dry air flow • Noise measured with NoiseOccscan usually with 10**5 pixel headers. A.Rozanov FE-I4 tests 29.07.2013

  4. Setup A.Rozanov FE-I4 tests 29.07.2013

  5. Digital Test • Digital_Test good for nominal configuration parameters: Amp2Vbpf=100 A.Rozanov FE-I4 tests 29.07.2013

  6. Digital Test • Very High noise at small value of Amp2Vbpf=5 block the discriminator, so the 400 MRadbeam spot is clearly seen. A.Rozanov FE-I4 tests 29.07.2013

  7. Digital Test • At intermediate values of Amp2Vbpf=10,20,40 the 400 MRadbeam spot also seen. Amp2Vbpf=40 Amp2Vbpf=10 Amp2Vbpf=20 A.Rozanov FE-I4 tests 29.07.2013

  8. NoiseOcc test • Typical statistics 10**5 headers • No noise at room temperature at nominal settings • Some noise at low temperature t=-22 degC, partly correlated with Beam Spot • In this test 1944 hits/10**5 headers • Noise only in 5 pixels A.Rozanov FE-I4 tests 29.07.2013

  9. NoiseOcc test • For low value of Amp2Vbpf=20 strong noise at low temperature t=-22 degC, strongly correlated with Beam Spot • In this test 46746 hits/10**5 headers A.Rozanov FE-I4 tests 29.07.2013

  10. NoiseOcc test • For intermediate value of Amp2Vbpf=40 noise at low temperature t=-22 degC, strongly correlated with Beam Spot • In this test 23676 hits/10**5 headers A.Rozanov FE-I4 tests 29.07.2013

  11. Noise versus temperature • For nominal value of Amp2Vbpf=100 noise starts at t~-10 degC • Typical 500/4000 hits/10**5 headers A.Rozanov FE-I4 tests 29.07.2013

  12. Noise versus temperature • For Amp2Vbpf=200 noise is similar to Amp2Vbpf=200 • Typical 200/5000 hits/10**5 headers A.Rozanov FE-I4 tests 29.07.2013

  13. Noise versus temperature • For Amp2Vbpf=20 or 40 noise linearly increase at low temperatures A.Rozanov FE-I4 tests 29.07.2013

  14. FE-I4-B output stuck by lowering temperature • Remarked that by lowering the temperature FE-I4 is often stuck with no data coming out • Happens with both DIGITAL_TEST and NoiseOcc. Even in the middle of the run • Does not happens increasing the temperature … • Reconfigure module does not help, but OFF/ON power cycle by STControl interface help • Malte told me that similar problem was observed in IBL modules and HardReset help to restart the module • In our case HardReset also helps A.Rozanov FE-I4 tests 29.07.2013

  15. Conclusions • Below t=-10 degC noise increase at nominal setting in few pixels • Partly correlated with irradiated region of the chip • At low values of Amp2Vbpf linear increase of the noise lowering the temperature • Strange effect of FE-I4 output stuck by lowering the temperature. Does it need more detailed investigations ? • More details in E-log: https://atlpix01.cern.ch/elog/FE-I4_SEU_measurements/302 A.Rozanov FE-I4 tests 29.07.2013

  16. Spare A.Rozanov FE-I4 tests 29.07.2013

  17. Some parameters of the configuration • FEI4b.irradiated.chip165.tuned3000e.TOT8.cfg.root • Amp2Vbn=79 • Amp2Vbp=85 • Amp2Vbpfol=26 • Amp2Vbpf=100 • Vthin_AltCoarse=0 • Vthin_AltFine=140 • FdacVbn=20 • DisVbn=26 A.Rozanov FE-I4 tests 29.07.2013

More Related