Title:
TIME-OF-FLIGHT MASS SPECTROMETER
Document Type and Number:
WIPO Patent Application WO/2016/027301
Kind Code:
A1
Abstract:
In this invention, ion transport optics (16) are disposed between an orthogonal acceleration unit (17) and a collision cell (13) having an ion-retaining function; when the ions that are retained in the collision cell (13) are to be released, an acceleration electric field having a large potential difference is formed between an exit side end portion of an ion guide (14) and the first stage of the ion transport optics (16), while a deceleration electric field having a relatively small potential difference is formed between the last stage of the ion transport optics (16) and the entrance end of the orthogonal acceleration unit (17). In the acceleration electric field, a large amount of energy is imparted to the ions to increase the velocity of the ions overall, and thus the ion spread in the ion travel direction caused by differences in mass-to-charge ratios is diminished. Meanwhile, the energy of the ions is decreased immediately before the orthogonal acceleration unit (17), and thus the ion spread in the ion travel direction caused by the deceleration is contained, while shifts in the direction of ion ejection when accelerating with the orthogonal acceleration unit (17) are decreased. In this manner, the range of mass-to-charge ratios for the ions accelerated in the orthogonal acceleration unit (17) is widened, allowing mass spectra of a wide range of mass-to-charge ratios to be obtained.
Inventors:
OKUMURA DAISUKE (JP)
Application Number:
PCT/JP2014/071603
Publication Date:
February 25, 2016
Filing Date:
August 19, 2014
Export Citation:
Assignee:
SHIMADZU CORP (JP)
International Classes:
H01J49/40; H01J49/42
Foreign References:
| JP2009512162A | 2009-03-19 | |||
| JP2002184349A | 2002-06-28 | |||
| US20020030159A1 | 2002-03-14 | |||
| JP2000340169A | 2000-12-08 | |||
| JP2011146287A | 2011-07-28 |
Attorney, Agent or Firm:
Kyoto International Patent Law Office (JP)
Patent business corporation Kyoto international patent firm (JP)
Patent business corporation Kyoto international patent firm (JP)
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