Sampler for Neutrino Telescope

By: Uriel BarronMatan Schlanger

Supervisor: Mony Orbach

Mid-Semester Review

Spring 2014

Large Neutrino detector at the South Pole

A collaboration of 11 universities worldwide

Detection of short, extremely weak RF pulsesover an area of 100km2

ARA- Askaryan Radio Array

ARA- Askaryan Radio Array

High Bandwidth (~850 MHz), rare (once every few months) and short (~2 ns) pulses

Strong price sensitivity – 37 stations, high frequency samplers cost thousands of dollars

Power consumption requirements (~2W)– limited power at the South Pole

Sample 4 channels with one board

The Problem

The Problem

Design and simulate a cheap sampler for high frequency short pulses, with low power consumption

Design will include BOM, electronic schematics, layers design and Gerber files

Our Goal

Using a DRS4 Domino Wave Circuit to quickly save analogously ~2000 sample.

Instead of continuous high-frequency sampling, using regular ADCs

All components are on-shelf and significantly cheaper than high-frequency samplers.

The Solution

Block Diagram

Bandwidth of at least 850MHz

Gain of about ~5

Power Consumption smaller then 900mW for all 4 channels together

Based on on-shelf components

Amplifier Requirements

We decided to use TI THS4303 amplifier

The amplifier has a constant gain of 10, so with trimmers we can change the actual gain using voltage divider

The amplifier has a BW of 1.4GHz

Each channel’s power consumption is ~220mW

Amplifier - Solution

Amplifier Circuit

Amplifier Circuit

Frequency

1.0Hz 10Hz 100Hz 1.0KHz 10KHz 100KHz 1.0MHz 10MHz 100MHz 1.0GHz 10GHz20*log10(V(Vout)/ V(Vin:+))

5

10

15

(1.2050G,10.854)

(859.620M,12.301)(330.370,13.834)

1.2

890

5

BW GHz

Power mW

Gain

Using the domino effect to save analog high-frequency signals, and later digitize them slowly

Contains 8 channels, each channel can save up to 1024 samples

Supports cascading of channels

We’ll be using Full Readout mode

The DRS4

DRS4 Connections

Gantt Chart

Any Questions?