NA34 (~1985-1996)
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| Links:
a page at Lund
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| Experiment NA34 (Helios), was one of 2 big survey experiments
(the other one was NA35) built for the new CERN heavy ion program. CERN
delivered oxygen, sulphur and lead beams, as well as protons.
We built a hadron spectrometer,
highlighted in the picture, which
viewed the target through a narrow slit in the calorimeter wall surrounding the
target area. We built drift chambers, aerogel threshold cherenkov counters and
a scintillator TOF wall.
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One of the two drift chambers under construction.
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| Walter assembling the drift chamber
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| Ira Blevis from Montreal also worked on the external spectrometer
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| Looking downstream, before target area installation. You are looking
at calorimeter modules. In the wall on the
left is the spectrometer slit. The upper half of the wall is held up
by Hexcell, which is honeycomb aluminum foil.
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| On the downstream side of this slit is the dipole magnet and the drift chamber.
this picture is taken before the installation of the PID detectors.
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| The completed spectrometer consisted of the dipole magnet and drift chamber (not visible
in this view), aerogel threshold counters,
TOF counters and backed by more calorimeter units.
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| The drift chamber on a rotating fixture
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| Nick Digiacomo was the team leader
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| These are the techs in the CERN wire stringing shop after
completion of the chambers
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| Pat and Hubert
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| We also made a hydrogen target. The little cylinder is filled with 800 atm of hydrogen,
and then welded shut. Only at LANL! I believe Nick carried this to CERN
in his pocket.
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| Barbara Jacak and Konrad Bussmann, our chief tech at CERN.
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| Pat and Hubert on top of the Jura likely Le Reculet) , overlooking CERN
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We also built a start counter for our
TOF system
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Volker Kroh and Walter building the
start counter
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We built an Aerogel threshold cherenkov counter,
using (Airglass) aerogel recycled from the EHS detector.
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Hubert, Barbara and Ira
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Machining aerogel takes special handling.
We built a custom sawing table
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Hubert selecting aerogel from the argon-filled
aquarium where we kept it
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scan_098.jpg
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