Production of a microbeam of slow highly charged ions with a single microscopic glass capillary

Interaction of proton microbeam with the inner surface of a polytetrafluoroethylene macrocapillary

“…These conditions showed up certain difficulties, such as the imperfect parallelism of the capillaries [13] or the collective effect of the neighbouring capillaries. Later, to avoid these difficulties, the single, micrometre sized and cylindrical shaped capillaries came into focus [14][15][16][17][18][19][20][21]. The advantage of using these types of targets is the many possible technical applications of them, such as to provide ion beams steering or focusing without external power supplies.…”

Conceptual design and sample preparation of electrode covered single glass macro-capillaries for studying the effect of an external electric field on particle guiding

“…The angular distributions of the transmitted ions have a similar width as the incident beam. Considerable transmission of guided ions could be observed for tilt angles up to roughly 5° [9,11,21]. The charging-up of the insulating wall material could be observed in time-dependent transmission measurements (see e.g.…”

Experiments and simulations of 4.5-keVAr7+−ionguiding through a conical glass macrocapillary

“…These studies confirmed the capillary guiding for various materials and revealed the dominant properties of the guiding mechanisms. Moreover, guiding of charged particles was successfully performed with single straight capillaries [11][12][13][14], single tapered capillaries [15][16][17], and between parallel glass plates [18]. The work with tapered capillaries was motivated by the aim to produce a beam whose direction may be controlled in microscopic dimensions.…”