1 / 10

Enhancing RPC Rate Capability with New Front-End Electronics

Learn about the new front-end electronics (FE) designed by R. Cardarelli to boost the rate capability of RPCs for high rates. The FE features high sensitivity, low noise, and fast shape, offering potential for safer chamber operation and reduced detector aging at higher luminosities.

sharne
Download Presentation

Enhancing RPC Rate Capability with New Front-End Electronics

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. Why we have been interested by the new FE electronics ?

  2. RPCs for high rates • The rate capability of a RPC is limited by the voltage drop ( Vd ) in the resistive elecrode • The voltage drop in the resistive electrode is : Vd= I * R I = counting rate * average charge R = resistivity * thickness of electrode

  3. How to increase the RPC rate capability? • Decrease the resistance  decrease resistivity and/or thickness • Decrease average charge per count But Also : The ageing of the RPC is proportional to the current R. Cardarelli et al. developed a new high performance front end electronics in order to decrease the average charge, details in : http://iopscience.iop.org/1748-0221/8/01/P01003

  4. Characteristics of the new preamplifier we have used for the tests : The New FE is based on a BJT transistor new preamplifier developed by R. Cardarelli • Sensitivity 1.5 mV/fC • Noise 2 fC RMS • Latch capability 100 ps • BW 10 MHz • Vth > 1.5 mV • Qth > 10 fC

  5. Slide by R. Cardarelli : more details see proc., RPC 2012 conference

  6. Slide by R. Cardarelli : more details see proc., RPC 2012 conference After the avalanche, the return to zero of the signal is driven by the BW ~ 10MHZ Rise time faster than the avalanche, Signal follows the avalanche process process

  7. A new version of the FE has been developed with a Si-GeBJT transistor reaching : • Qth < 1fC

  8. High rate capability Performance measurements of a 2mm gap and of a 1+1 mm bigap RPC with electrodes of phenolic plastic material (2.10^10 Ohm) done by R. Cardarelli et al. at the GIF, using the new preamplifier with a 50 ohm impedance pick-up strip show a rate capability up to 10 kHz/cm^2

  9. With a high sensitivity & low noise preamplifier many aspects become very important: -control and reduce as much as possible all the external sources of noise, in particular the noise produced by the switching HV power supply ; For this reason we installed a high frequency filter based on a transformer - control the grounding , it has to be robust to reject the external radiofrequencies - HV high Frequency filter working principle :

  10. Decrease by several hundreds of volts of the WP Decrease significantly of the average charge New FE : -High sensitivity -Low noise -Fast shape We can expect : - High rate capabilities - Safer operation of the chambers - Slower aging of the detector at higher Luminosities (due to the standby like operation)

More Related