SPECTRAP - GSI progress report and status overview.

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Presentation transcript:

SPECTRAP - GSI progress report and status overview

Zoran Anđelković Initial problems => The best option was to disassemble the whole system piece by piece View ports were not in line No vacuum could be established We had no idea how the whole system looked inside The trap had to be changed anyhow

Zoran Anđelković Stage I – dismantling Liquid nitrogen dewar Liquid helium dewar Outer (70K) shield Inner (4K) shield Mounting “can” SC magnet coils trap 4K elec. ions

Zoran Anđelković Removing the outer shield Supported by a small crane Positioning spokes

Zoran Anđelković Removing the LN dewar

Zoran Anđelković Broken bellows on the LN dewar

Zoran Anđelković LN dewar and inner shield overview

Zoran Anđelković Removing the inner shield Some broken electronics parts Broken support disc of the inner shield + other smaller damages

Zoran Anđelković The “old” trap & 4K electronics a hyperbolic trap with two “pre-traps” amplifier and (broken) coil

Zoran Anđelković Removing the LHe dewar

Zoran Anđelković Intermezzo I – the HITRAP platform... and the SPECTRAP setup on it future beam line

Zoran Anđelković Stage II – repaired? No, still vacuum problems ~ 6·10 -2 mbar 

Zoran Anđelković Leak (hole) search pumping test of the dewars found a bad weld on the LN dewar no further (big) leaks detected

Zoran Anđelković Intermezzo II – the “new” trap Trap design modified for purposes of SPECTRAP

Zoran Anđelković Further modifications new electronics development with help of Stahl electronics additional mirror & lens pair

Zoran Anđelković Next steps Put the system (again) back together and check the vacuum Add the electronics and optics to the trap If the vacuum should be OK – cool down (LN + LHe) and energize the SC magnet Think of installing a Faraday cup under the trap Shoot some (any) ions through Make simulations of ions inside the trap Be optimistic!