Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
Collection
Years
  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 65 (1994), S. 3036-3037 
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A simple technique is demonstrated for preventing microchannel plate (MCP) response to scattered laser light in a multiphoton ionization experiment. The MCP is gated on after the laser pulse, with a turn-on time of less than 1 μs, by switching its cathode from 0 to −1900 V. The high-voltage pulse circuit uses power MOSFETs and was designed according to the procedure of Baker and Johnson [Electron. Lett. 29, 56 (1993)].
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 65 (1994), S. 3589-3589 
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: An inexpensive regulator circuit for high-voltage but low-current applications, such as biasing electrodes for the manipulation of charged-particle beams, is described. Using multiple regulator circuits running in parallel, numerous outputs can be produced from a single high-voltage supply, resulting in significant cost savings.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 66 (1995), S. 3389-3390 
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: We have improved the high-voltage pulse circuit which we recently described for eliminating microchannel plate response to scattered laser light in our multiphoton ionization experiment [Rev. Sci. Instrum. 65, 3036 (1994)]. Our new design produces much less noise and is much more robust. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 106 (1997), S. 7378-7390 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We have measured the sticking coefficient of H2 on Pd(111) as a function of incident translational energy, over the range 31–94 meV, and initial H2 rotational state J, for J=0 through J=5, at a surface temperature of 423 K. These measurements test recent theoretical predictions that the H2/Pd sticking coefficient should decrease with increasing J, for low J, because more quickly rotating molecules are less easily "steered" to dissociation sites by interaction with the surface as they approach the metal [A. Gross, S. Wilke, and M. Scheffler, Phys. Rev. Lett. 75, 2718 (1995)]. We find that the sticking coefficient is sensitive to the rotational quantum number, first decreasing as J is raised from 0 to 3, then increasing again for J=4 and 5. The greatest sensitivity found occurs for an incident translational energy of 73 meV, for which the sticking coefficient decreases from 0.76±0.05 for J=0 to 0.54±0.13 for J=3. In addition, we have found that a fraction of the H2 incident in states J=0 and J=1 is excited to states J=2 and J=3, respectively, upon collision with the surface, with a probability that increases strongly with surface temperature and is roughly independent of incident translational energy. This rotational excitation does not result from dissociation followed by recombinative desorption, but occurs directly upon scattering from the surface. Furthermore, the majority of the excitation energy comes from the surface, and not from the incident translational energy of the molecule. The J-dependent sticking coefficients and the rotational excitation of the incident molecule by the surface are together strong evidence for a coupling between the surface and the rotational degree of freedom of the incident molecule, and support the model of dynamical steering in the adsorption process. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...