| Paper | Title | Page |
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| THPP21 | Design and Development of a Novel Stripline Fast Faraday Cup to Measure Ion Beam Profile | 246 |
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Present day heavy ion accelerators use bunched ion beams of sub-nanosecond time scale for beam acceleration. In order to monitor its longitudinal profile, fast faraday Cups are employed. Owing to the advent of microstrip technology and its fabrication process, planar structures have become easier to fabricate. A novel design using the same is developed with a special provision for mounting edge launch connectors through a microstripline, followed by a microstrip to stripline transistion to again a microstrip structure in the beam interaction hole. The entire structure is a 50 Ω & is bidirectional. An experimental study on via placement around central strip has also been conducted to not only ensure the field containment around the strip but also for bandwidth enhancement. To measure ion beam currents from 10-100 nA and a bunch width of < 1ns, device has been beam interaction hole of around 10mm. 3 dB bandwidth is measured >6 GHz with a rise time of ~60 ps. The devices are also provided with a bias ring on the topmost layer of the 3 layer architecture for electron suppression. In this paper, design, fabrication and RF testing stripline fast faraday cup is presented.
1. M. Bellato et al, "Design and tests for the Fast Faraday cup of ALPI post-accelerator", NIM A 2. C. E. Deibele, "Fast Faraday Cup with High Bandwidth", US Patent no. 7012419B2. |
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Poster THPP21 [0.912 MB] | |
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2020-THPP21 | |
| About • | paper received ※ 02 September 2020 paper accepted ※ 18 September 2020 issue date ※ 30 October 2020 | |
| Export • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | |
| THPP12 | Characterization Study of a Button BPM with an Approach to Automated Measurements | 233 |
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| Beam position monitors (BPMs) are one of the very im-portant diagnostic components of any accelerator systemgiving information about beam position. It is a class of non-intercepting devices which use the coupling of the EM fieldaround a charged particle bunch to some sort of conductorelectrodes to recover beam position information from thebeam-induced signals. In this paper, a characterization studyof an in-house developed Button BPM including sensitivitymeasurement and transfer impedance studies is presented. Sensitivity measurement was done using the stretched wiremethod by passing current pulses through the wire of differ-ent diameters like 0.5 mm and 1 mm, thus mimicking thebehavior of the actual beam. Sensitivity information wasthen used to reciprocate the 2-D position map of the device. Owning to the time taken for such huge measurements, anautomated BPM test bench approach of the whole setup isdeveloped by remote interfacing over LAN. A substantialdecrease in measurement time was observed along with areduction in measurement error. | ||
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Poster THPP12 [2.308 MB] | |
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2020-THPP12 | |
| About • | paper received ※ 02 September 2020 paper accepted ※ 15 September 2020 issue date ※ 30 October 2020 | |
| Export • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | |