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Title | Zero-Length Conflat Fin-Type Nonevaporable Getter Pump Coated with Oxygen-Free Palladium/Titanium | |
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Abstract | We have developed a zero-length conflat fin-type nonevaporable getter (NEG) pump that uses oxygen-free palladium/titanium (Pd/Ti)*. After baking at 150 degrees centigrade for 12 h, the pumping speeds of the NEG pump for H₂ and CO were 2350~800 L/s and 1560~20 L/s, respectively, in the pumped-quantity range 0.01~30 Pa L. The morphologies of oxygen-free Pd/Ti films on the partition plates and the base plate were examined by scanning electron microscopy, scanning transmission electron microscopy, and energy-dispersive X-ray spectroscopy. The Ti was completely coated with Pd on the bottom, whereas the partition plates were covered by Pd/Ti nanostructures. Our new NEG pump is ideal for maintaining ultrahigh vacuums in the range 10⁻⁸ to 10⁻⁹ Pa, because (a) its pumping speeds for H₂ and CO are quite large, (b) it can evacuate H₂O and CO₂ when an ionization gauge is used in the vacuum system, (3) it can be activated by baking at 150 degrees centigrade for 12 h, (c) its pumping speed does not decrease even after 9 cycles of pumping, baking, cooling to room temperature, and exposure to air**, (5) it requires neither a dedicated power supply nor electric feedthroughs, and (6) it is space saving and lightweight. | |
Footnotes & References | *T. Miyazawa et al., J. Vac. Sci. Technol. A 36, 051601 (2018). **T. Kikuchi et al., AIP Conf. Proc. 2054, 060046 (2019). |
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Funding | This work was partly supported by a JSPS KAKENHI (JP19K05280), a TIA-Kakehashi (TK19-035), and the 2019 Takahashi Industrial Economic Research Foundation grant, and was supported by NIMS TEM Station. | |
Paper | download TUOA03.PDF [1.163 MB / 4 pages] | |
Slides | download TUOA03_TALK.PDF [1.643 MB] | |
Export | download ※ BibTeX ※ LaTeX ※ Text/Word ※ RIS ※ EndNote | |
Conference | MEDSI2020 | |
Series | Mechanical Engineering Design of Synchrotron Radiation Equipment and Instrumentation (11th) | |
Location | Chicago, IL, USA | |
Date | 24-29 July 2021 | |
Publisher | JACoW Publishing, Geneva, Switzerland | |
Editorial Board | Yifei Jaski (ANL, Lemont, IL, USA); Patric Den Hartog (ANL, Lemont, IL, USA); Kelly Jaje (ANL, Lemont, IL, USA); Volker R.W. Schaa (GSI, Darmstadt, Germany) | |
Online ISBN | 978-3-95450-229-5 | |
Online ISSN | 2673-5520 | |
Received | 30 July 2021 | |
Accepted | 14 October 2021 | |
Issue Date | 08 November 2021 | |
DOI | doi:10.18429/JACoW-MEDSI2020-TUOA03 | |
Pages | 107-110 | |
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