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Towards sympathetic cooling of trapped ions with laser-cooled Mg+ ions for mass spectrometry and laser spectroscopy. Radu Cazan. M. Bussmann, Int.J.MassSpec. 251 , 179(2006). The Purpose. Setup of a system for cooling ions in a trap to a very low temperature, regardless of their

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Radu cazan

Towardssympatheticcoolingoftrappedionswithlaser-cooled Mg+ ionsformassspectrometryandlaserspectroscopy

Radu Cazan


The purpose

M. Bussmann, Int.J.MassSpec. 251, 179(2006)

The Purpose

  • Setup of a system for cooling ions in a trap to a very low temperature,

  • regardless of their

  • - charge state,

    • - energy level structure or

    • - other parameters

    • ->sympathetic cooling by laser cooled Mg ions.



First resonator
First resonator


First resonator1
First resonator

EnhancementfactorA~40-60

P559=325 mW

for P1118=970 mW

~775 mW coupled


First resonator resized refurbished laser
First resonator- resized & refurbishedlaser

Smaller cavity:

+ increased FSR =

+ increased bandwidth

+ better stability

- up to 10% less output in our case

P=1.85 W in

twomodes +

0.45 W A.S.E.

P559=170-210 mW

for P1118~1050 mW

?% ASE & 2nd mode

Maximum c.e.~57%

=>P1118~600 mW


Second resonator
Second resonator


Second resonator1
Second resonator

P279=16.7 mW max

~15 mW average

Enhancementfactor A~60-70

for P559~210 mW

~170 mW coupled


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