A synchrotron for neutral molecules

Heiner, Cynthia E.; Bethlem, Hendrick L.; Meijer, Gerard

doi:10.1016/j.cplett.2009.02.069

Cited by 10 publications

(8 citation statements)

References 36 publications

(43 reference statements)

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“…By switching the electric fields, the width of the packet after 40 round trips was confined to only 3 mm. In later measurements, Heiner and coworkers demonstrated that a packet of molecules was kept in a tight bunch even after completing 100 round trips, corresponding to a flight distance of 80 m [27]. The same group also showed the successful demonstration of the simultaneous confinement of two molecular packets, trailing each other by about 200 mm [24].…”

Section: Introductionmentioning

confidence: 78%

“…In the old two segment molecular synchrotron, every time the molecular packet enters a gap region the electric field is switched between different configurations to achieve a longitudinal confinement force. The old bunching scheme is described in detail in references [24,27]. Briefly, when the synchronous molecule is near a gap between adjacent hexapoles, the voltages on the hexapole in which it currently resides (hexapole 1) are switched to ground while the voltages on the next hexapole (hexapole 2) are switched such as to generate a strong homogeneous electric field.…”

Section: Comparison Between Different Bunching Schemesmentioning

confidence: 99%

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A Forty-Segment Molecular Synchrotron

Zieger

Eyles

Meerakker

et al. 2013

Zeitschrift Für Physikalische Chemie

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We present a synchrotron for polar molecules consisting of 40 straight hexapoles arranged in a circle with a 50 cm diameter. The mechanical design and alignment procedure as well as the trigger scheme used to switch the voltages applied to the hexapoles is described in detail. The stability of the synchrotron is demonstrated by measurements in which multiple packets are stored for over 13 seconds, during which they have completed over 1000 round trips and traveled a distance of over one mile. Furthermore, we demonstrate the simultaneous trapping of 26 packets; 13 revolving clock-wise and 13 counter clock-wise in the ring that are injected into the ring by two Stark decelerator beamlines. We discuss the opportunities for using the synchrotron as low-energy collider.

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Section: Introductionmentioning

confidence: 78%

Section: Comparison Between Different Bunching Schemesmentioning

confidence: 99%

A Forty-Segment Molecular Synchrotron

Zieger

Eyles

Meerakker

et al. 2013

Zeitschrift Für Physikalische Chemie

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“…Our device will also be used to superpose two beams by operating it in the reverse configuration to yield precisely the arrangement required for merged-beam studies, [17][18][19] which to date have not been possible with two beams of polar molecules due to the difficulty of transversely injecting a beam into an electrostatic guide without the molecules being deflected. In a similar manner the present arrangement can be used, for example, to load an electrostatic storage ring for polar molecules [22,23] which to date has been possible only by switching the ring off momentarily which imposes odious physical restrictions on the temporal profile of the packet stored inside the ring.…”

Section: Introductionmentioning

confidence: 99%

3D-Printed Beam Splitter for Polar Neutral Molecules

Gordon

Osterwalder

2017

Phys. Rev. Applied

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We describe a macroscopic beam splitter for polar neutral molecules. A complex electrode structure is required for the beam splitter which would be very difficult to produce with traditional manufacturing methods. Instead, we make use of a nascent manufacturing technique: 3D printing of a plastic piece, followed by electroplating. This fabrication method opens a plethora of avenues for research, since 3D printing imposes practically no limitations on possible shapes, and the plating produces chemically robust, conductive construction elements with an almost free choice of surface material; it has the added advantage of dramatically reduced production cost and time. Our beam splitter is an electrostatic hexapole guide that smoothly transforms into two bent quadrupoles. We demonstrate the correct functioning of this device by separating a supersonic molecular beam of ND 3 into two correlated fractions. It is shown that this device can be used to implement experiments with differential detection wherein one of the fractions serves as a probe and the other as a reference. Reverse operation would allow to merging of two beams of neutral polar molecules.

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“…Indeed, collisions with the nondecelerated particles in the beam, e.g., the carrier gas or atoms and molecules with quantum states or velocities and initial positions outside the acceptance of the decelerator, are difficult to avoid and can significantly complicate the data acquisition and analysis. To circumvent these difficulties, decelerators have been designed with which the atom and molecule samples can be deflected or guided away from the original propagation axis of the supersonic beam during or after deceleration [25][26][27][28]. Recently, Narevicius and coworkers have demonstrated that reactive scattering can be studied at very low collision energies if two supersonic beams of almost the same, but not necessarily a low, velocity are merged using a magnetic guide to deflect one of the beams [29].…”

Section: Introductionmentioning

confidence: 99%

Surface-electrode decelerator and deflector for Rydberg atoms and molecules

et al. 2014

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A surface-electrode decelerator and deflector for Rydberg atoms and molecules has been developed with the goal of performing collisional experiments. Translationally cold H2 molecules in a supersonic beam were excited to Rydberg-Stark states of principal quantum number n = 31, loaded into electric traps moving at constant speed above the surface of a bent printed circuit board, and deflected from the original direction of the supersonic beam by an angle of 10 •. The phase-space characteristics of the deflected beam were characterized by measuring the time-of-flight distribution and images of the Rydberg molecules and comparing them to the results of numerical particle-trajectory simulations. More than 1000 H2 molecules were deflected per experimental cycle at a repetition rate of 25 Hz. The phase-space characteristics of the deflector make it attractive to study ion-molecule reactions at low collision energies.

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A synchrotron for neutral molecules

Cited by 10 publications

References 36 publications

A Forty-Segment Molecular Synchrotron

A Forty-Segment Molecular Synchrotron

3D-Printed Beam Splitter for Polar Neutral Molecules

Surface-electrode decelerator and deflector for Rydberg atoms and molecules

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