TWO ROTATING ELECTRIC FIELDS MASS ANALYZER

    公开(公告)号:EP2956955B1

    公开(公告)日:2018-09-05

    申请号:EP14752094.4

    申请日:2014-02-07

    Abstract: A mass analyzer includes two rotating electric field (REF) units, sinusoidal signal generators and a means for separation of dispersed ions. The REF units include a plurality of elongated electrodes surrounding a central axis, and are lined in tandem at elongated direction. Sinusoidal signals are applied to the electrodes to rotate electric fields within each REF unit. The means for separation is placed adjacent the downstream end of the 2nd REF unit. Ions enter the 1st REF unit, diverge outwards and leave the 1st REF unit on off-axis positions. The ions successively enter the 2nd REF unit and converge inwards because of 180 degrees phase difference from the 1st REF unit. Specified mass ions return to and travel along the central axis. However, unspecified mass ions deviate from the central axis and travel apart from the central axis. The means for separation separates specified ions from unspecified ions.

    RETARDING POTENTIAL TYPE ENERGY ANALYZER
    3.
    发明公开

    公开(公告)号:EP3330998A4

    公开(公告)日:2018-08-01

    申请号:EP16886330

    申请日:2016-01-21

    Abstract: In a retarding potential type energy analyzer including a front grid electrode 21, reference grid electrode 22 and rear grid electrode 23 sequentially arranged, with a predetermined amount of potential difference given between the reference grid electrode 22 and the front grid electrode 21 to form an upward potential gradient as well as a potential difference given between the reference grid electrode 22 and the rear grid electrode 23 to form a downward potential gradient, the grid electrodes are arranged so that the distance between the reference grid electrode 22 and the rear grid electrode 23 is shorter than the distance between the reference grid electrode 22 and the front grid electrode 21, or the potential difference between the reference grid electrode 22 and the rear grid electrode 23 is made to be greater than the potential difference between the reference grid electrode 22 and the front grid electrode 21.

    Analyser arrangement for particle spectrometer
    7.
    发明授权
    Analyser arrangement for particle spectrometer 有权
    AnalilatoranordnungfürTeilchenspektrometer

    公开(公告)号:EP2851933B1

    公开(公告)日:2016-10-19

    申请号:EP14185601.3

    申请日:2012-03-06

    Inventor: Wannberg, Björn

    Abstract: The present invention relates to a method for determining at least one parameter related to charged particles emitted from a particle emitting sample (11), e.g. a parameter related to the energies, the start directions, the start positions or the spin of the particles. The method comprises the steps of guiding a beam of charged particles into an entrance of a measurement region by means of a lens system (13), and detecting positions of the particles indicative of said at least one parameter within the measurement region. Furthermore, the method comprises the steps of deflecting the particle beam at least twice in the same coordinate direction before entrance of the particle beam into the measurement region. Thereby, both the position and the direction of the particle beam at the entrance (8) of the measurement region (3) can be controlled in a way that to some extent eliminates the need for physical manipulation of the sample (11). This in turn allows the sample to be efficiently cooled such that the energy resolution in energy measurements can be improved.

    Abstract translation: 本发明涉及一种用于确定与从粒子发射样品(11)发射的带电粒子有关的至少一个参数的方法,例如, 与能量,起始方向,起始位置或颗粒的旋转相关的参数。 该方法包括以下步骤:通过透镜系统(13)将带电粒子束引导到测量区域的入口,以及在测量区域内检测指示所述至少一个参数的粒子的位置。 此外,该方法包括以下步骤:在粒子束进入测量区域之前,在相同的坐标方向上将粒子束偏转至少两次。 因此,能够以在某种程度上不需要对样品(11)的物理操作的方式来控制测量区域(3)的入口(8)处的粒子束的位置和方向。 这又允许样品被有效地冷却,使得能量测量中的能量分辨率可以得到改善。

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