Antonio Romero (USC)

VERTICAL HODOSCOPES

VH

Carlos MarinasAntonio Romero

University of Santiago de CompostelaNovember ´06

Antonio Romero (USC)

40 Hodoscopes

36 were used on the previous setup These were completely reassembled

and refreshed 4 are new

The technique used is the same as the old ones

They are placed covering the area of higher momentum in left arm (+)

Antonio Romero (USC)

Some photos…

Old hodoscopes refreshed

Detail of the assembling

Antonio Romero (USC)

Tests

All hodoscopes were tested Lightproof Signal shape Signal amplitude with cosmic rays

Magnetic shielding is guaranteed with mumetal (1-17 miliGauss)

They are placed in the frame Gap between slabs in + arm: 0.9 mm Gap between slabs in – arm: 1.2 mm

Antonio Romero (USC)

Some photos…

Experimental setup

Signal shape

Mumetal

Gaps

Antonio Romero (USC)

Cabling

The new hodoscopes have signal and HV cables, coming from old PSh in the previous setup

All the cables were rearranged in the electronics panel and also in the power supply

The cables were tested Impedance Signal transmision Voltage

Antonio Romero (USC)

photos

Don´t touch the ´blue´ cables!!

Antonio Romero (USC)

With beam…

We tested if all the signals exist We made the fine tunning of

voltages in order to have the same amplitudes Primitive Trigger with oscilloscope

using VH and HH We repeated the process one month

after the beginning of the beam

Everything is working!

Antonio Romero (USC)

Conclusions

The system of Vertical Hodoscopes is refreshed

All detectors are working and have the same amplitude

The first tunning is made, but a fine tunning is needed