22-29 July 2015
Europe/Vienna timezone

LECTURING ON SILICON SENSORS USING THE EDUCATIONAL ALIBAVA SYSTEM

Jul 25, 2015, 9:35 AM
15m
HS7

HS7

talk Education and Outreach Education and Outreach

Speaker

Carlos Lacasta Llacer (IFIC-Valencia)

Description

The Educational ALIBAVA System (EASY) is a compact and portable system for lecturing sensor instrumentation at university teaching laboratories. EASY tests and readouts a silicon micro-strip sensor. The front-end electronics is based on a low noise ASIC with 128 input channels. Semiconductor devices are widely used as radiation sensors in many scientific and industrial applications. They are of uttermost importance in the High Energy Physics experiments as tracking devices and extensively used in Nuclear Physics for spectroscopy. Moreover, silicon sensors are extensively used in medical physics imaging and inland security, where their low cost, miniaturization, packaging and integration of electronics represent a clear advantage. A book of exercises with EASY (including theory explanations and hands-on activities) helps physics and engineering students to be educated on the first principles of the semiconductor sensors, their operation in real systems, as well as the associated electronics. There one can find clear explanation of the different type of runs to acquire the data, and with a proposal of some basic exercises for the students like: setting the operation voltage of the sensors, finding the pedestals and the noise, the synchronization with the trigger, charge collection and energy deposition, depletion voltage of the sensor, charge sharing between neighbour strips, the spatial resolution of the sensor and spectroscopy with different radioactive source.

additional information

The EASY features were developed with the goal of fully exploiting the capabilities of the system while simplifying its setup and helping to understand the basic principles and operation of the systems with semiconductor devices:
1) The system incorporates a HV unit to bias the sensors.
2) Encapsulating box that protects against accidents and misuse.
3) The system includes an infrared laser to point to individual channels.
4) Experiments manual with basic experiments with a laser and radioactive sources
5) Acquisition software and data analysis macros adapted to the experiments manual.
In addition to these, the system has self-triggering capabilities, plus a diode, which may be used for triggering the acquisition. Thus, there is no need of an external trigger generator.
EASY includes an infrared laser and mounted on a focusing system to point individual channels, study charge sharing between channels and study the laser penetration in the semiconductor sensors. For these studies, EASY generates its own periodic trigger.
The system comes with a step by step guide that explains how to operate with it, given a clear explanation of the different type of runs to acquire the data, and with a proposal of basic exercises for the students like: setting the operation voltage of the sensors, finding the pedestals and the noise, the synchronization with the trigger, charge collection and energy deposition, depletion voltage of the sensor, charge sharing between neighbour strips, the spatial resolution of the sensor and spectroscopy with different radioactive source. As example, the study of the laser penetration in silicon sensors will be presented.

Primary authors

Carmen Garcia (IFIC Valencia (ES)) Jose Bernabeu Verdu (Universidad de Valencia (ES)) Salvador Marti I Garcia (IFIC-Valencia (UV/EG-CSIC))

Co-authors

Ashley Greenall (University of Liverpool (GB)) Carlos Lacasta Llacer (IFIC-Valencia) Gianluigi Casse (University of Liverpool (GB)) Giulio Pellegrini (Centro Nacional de Microelectrónica (IMB-CNM-CSIC) (ES)) Mr Joaquín Rodriguez (ALIBAVA systems) Mr Jumilla Carlos (ALIBAVA Systems) Manuel Lozano Fantoba (Instituto de Fisica Corpuscular (ES)) Miguel Ullan Comes (CNM-Barcelona (ES))

Presentation materials