J A Garzon Trasgo2010 Intro

2nd. Workshop
on

Proyecto

Project

Still walking...

Juan A. Garzón: 2nd. Workshop on the Trasgo Project. S. Compostela Feb. 5th-6th. 2010
1

A TRASGO
What is it?


Following a Spanish Dictionary:


What we pretend to be:

An affordable and high performance High Energy
charged particles Timing and Tracking detector to be
used everywhere an affordable and high performance
high energy charged particles timing and tracking
detector is needed

DAQ
and
Power Supplies


A trasgo pretends to offer:


Detectors
Strip or Cell

Affordability Chamber

Basic elements common to
the different configurations
Plane

FEE Electronics DAQ Boards Other elements

HV power supply
LV power supply
Temperature, pressure sensors
Acquisition, reconstruction
and analisys software
…



Modularity



Versatility

Different number of detectors Absorbers



Capability of working
Sand-alone


A TRASGO
Why is it special?

Juan A. Garzón: 2nd. Workshop on the Trasgo Project. Santiago de Compostela Feb. 5th-6th. 2010

Three basic ingredients:

-High time resolution detectors
Timing Resistive Plate Chambers
-Data acquisition board including the
reconstrucion and analysis software
TTB: Timing and Tracking Board
-A powerful and fast track reconstruction
Algorithm
TimTrack


- High time resolution detectors
Timing Resistive Plate Chambers

-Timing Resitive Plate Chambers (tRPCs) offer the best
performances at the best price to cover big surfaces
- Are easy to manufacture in mass production
- Robust and relatively easy to handle
- Difficult to build offering the best performance

Tentative minimum requirements:
. Eficiency > 90%
Time resolution < 200ps
Isolating Rate capability > 100Hz/cm2
Cover HV Dead time of a single channel < 100ns
Gas flow

Chamber side view


- Data acquisition board including the
reconstrucion and analysis software
TTB: Timing and Tracking Board

Inspired by the TRB (Trigger Readout Board) of HADES-
GSI

- Tracking implemented in FPGA’s
+ - Analisis implemented in board processor (ETRAX)

TRB

-A powerful and fast track reconstruction
Algorithm:
TimTrack
L Vector s depends on the data
x Matrix K depents on the layout

Covariance matrix, V:
V = K-1
z

X’ V This equation provides the saeta
X0 T0 directly from the data
Vz Y’
z=0
Y0 y
Saeta: s = (X0,X’,Y0,Y’,T0,1/Vz)


A TRASGO
Minimum requirements


Box
4 RPC planes

80 cm
TRB/TTB
128 channels

FEE
32channels/plane 80 cm

80 cm


Trasgo’s resolutions (β=1. Units: ps, cms and radians)

1 TRB : 128 channels 2 TRBs :256 channels

δtRPC Planes/Trasgo δT0 δv/v(%) δx δx’ δT0 δv/v(%) δx δx’

4 70 7 9.4 0.03 70 7 5.4 0.02

200ps 6 58 5 9.9 0.04 58 5 6.0 0.02

8 50 6 10 0.04 50 6 6.5 0.02

4 35 3.6 7.1 0.024 35 3.6 4.7 0.02

100ps 6 30 3.1 6.9 0.025 30 3.1 5.0 0.02

8 25 3 6.4 0.024 25 3 5.1 0.02


A TRASGO
What is it for?


Cosmic ray detection is useful not only for research in cosmic rays!

- Dosimetry in airplanes, computing and telecomunication equipments,
high energy particle physics accelerators environments…
- Interplanetary magnetic field measurements
- Solar activity
- Correlation studies between cosmic rays and climate changes
- Ultra High energy nuclear physics models
- Ultra High energy physics radiation with mater interaction
- and other secondary uses:
- Calibration of detectors
- Search of hidden chambers in pyramids
- Earth subsoil “radiography”
-…
A detector with outstanding performances like the Trasgo may be very
useful for some of these and other tasks, either working alone, in pure
trasgos arrays or in hybrid arrays


Let’s see some examples


Cosmic Rays Astroparticle Physics
High energy cosmic rays interact in the highest layers of the atmosphere
producing showers of billions of secondary cosmic rays that are detected
at the earth surface

Primary cosmic ray properties (direction, mass, energy) are estimated
from the information measured at the Earth surface


But…
showers lose many information about their birth and to estimate the properties
of the primary cosmic ray has many unaccuracies:

CCOU02

The scatter of points on a plot of the average logarithm of the nuclear mass number of the
primary cosmic rays versus energy clearly shows the need for more input from accelerators.

… and some estimations have to be done with the help of MonteCarlos


Just a few tracking detectors with enough accuracy and size may provide
very significative information about the shower properties:
- Density of particles
- Width of the shower front
- Curvature
- Mean values, dispersion, asymmetries of the arrival angles
- Some electrons/muons separation

Hypothesis:
The increasing of measured information, its redundancy and its accuracy
(with Trasgos) may allow to improve the estimation of the primary cosmic ray.


A very nice exercise:

It could be very interesting to repeat the pioneering experiment done by Bassi,
Clark and Rossi in the fifties to determine the properties of the atmospheric showers
with the time, position and angular resolution provided by the Trasgos.


[Bassi, Clarck and Rossi: 1953]


Other uses:

As complementary detectors for underground cosmic ray experiments


Other uses:
For improving muon resolution in big spectrometers


Other uses:

Calibration of hugh observatories

For example: Antares/Km3


Other uses:
Cosmic rays and Climate

Helada en Londres en 1684

Correlations between climate and solar activity


GCR: Galactic Cosmic Rays

[http://en.wikipedia.org/wiki/Image:Structure_of_the_magnetosphere_mod.svg]

Other uses:
Analysis of the correlation between high energy cosmic rays and the climate changes

Correlations have been observed between the themperature of the stratosphere
and the flux of muons at ½ mile underground (high energy muons):High energy
(narrow) showers could be measured with the help of Trasgos


A TRASGO
Where we are?


2009 was a very hard yea for the Trasgo project:
- Any support from the Spanish funding Agency
- Any support from the Galician funding Agency
- A lot of work with the commissioning of the HADES tRPC wall

But, however, we had a few significatives advances:


Trasgo project

- Cells development
The groups of LIP-Coimbra and LabCAF-USC have started the
R&D of sealed timing RPCs (Talks of P. Fonte & M. F.
Morales)

- A poster has been accepted in the RPC2010 conference

- 12 cells from Hades available to built the 1st. prototype

- First steps done in order to open a collaboration with Dept. of
Electronics (Prof. J. Bruguera) and the GSI (Dr. M. Traxler) to
implement the tracking and the reconstruction software in a TRB


A first Geant for Trasgos is ready
… and well documented at the Hades Wiki page (thanks Diego!)


TimTrack:
- 1st. article accepted in Nucl. Instr. & Meth. A
- An oral presentation accepted in RPC2010 Conference
- Version of TimTrack for Drift Chambers ready and being tested with
HADES MDC simulated data (preliminary results encouraging)
- First test done with real data:
Cosmic data from the commissioning of the HADES tRPC wall
(Talk of P.Cabanelas)
- A couple of collaborations are being opened with:
Leo Alonso (Dept. of Algebra /USC)
Wenceslao G. Manteiga & Cesar Sanchez (Dept. of Statistics)
to explore the mathematical aspects of the method
-A collaboration opened with the CESGA (C. de Supercomputación
de Galicia) to write the code in C language and adapted to be used
with parallel computers or multicore processors


Accepted in NIM A


1st. formalism approach


A TRASGO
Next steps


Next steps
- Advance in the development of sealed RPCs

- Analyze the cosmic data taken with the HADES tRPC wall at GSI

- Advance in the mathematical aspects of the TimTrack (?)

- Advance in the development of a new version of TRB: TTB (?)


- Build a first prototype, using:
12 HADES tof tRPC cells
HADES FEE boards
1 TRB V2.


Next steps
- To extend or redefine the Meiga project
(This afternoon at 19h30)


Proyecto

(Mini Ensemble for Identifying GAlactic radiation )


Meiga


Expected fluxes of Cosmic Rays at the sea level
Density/m2 Energy(eV) Frec/m2.day Radius(m) Area (m2) NClusters/day/m2
1015 0.03 30 3 103 100
1016 3 10-4 150 7 104 20
>5 1017 3 10-6 330 3.5 105 1 ~120
1018 3 10-8 650 1.3 106 0.04

1015 3 10-2 20 103 30
1016 3 10-4 100 3 104 9
> 10 1017 3 10-6 280 2.5 105 0.75
~40
1018 3 10-8 550 106 0.024

1015 3 10-2 10 3 102 10
1016 3 10-4 80 2 104 6
> 17 1017 3 10-6 250 2 105 0.6
~16
1018 3 10-8 480 7 105 0.021

1016 3 10-4 60 104 3
1017 3 10-6 200 105 0.3
> 30 ~3
1018 3 10-8 400 5 105 0.015

1016 3 10-4 50 8 103 2.4
1017 3 10-6 160 8 104 0.24
> 40 ~2.5
1018 3 10-8 350 4 105 0.012


Overview
of the Workshop


IN MEMORIAM

Juan Antonio Rubio
(1944 - 2010 )


Juan Antonio, ¡ va por ti!


THE END


Somewhere over the rainbow,
skies are blue
And the dreams that you dare to dream ,
really do come true

(The Wizard of Oz)


L
x

z

X’ V
X0 T0
Vz Y’
z=0
Y0 y

J A Garzon Trasgo2010 Intro

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