[Spm] Re: Spm Digest, Vol 52, Issue 3

[yang]

Dear Andreas Straub,

We have no exact idea about this 20Hz noise. It appears sometimes.  
But sometimes the STM works well without any noise. I hope the  
following information will be useful for you. We will also try to  
understand the origin of the 20Hz noise. Keep in touch please.

Best regards,
----------------------------------
Dear Peng Yang,

You could be looking at the building “talking”. All buildings will  
have a resonant frequency and most fall between 16 and 30Hz. If you  
are not on a vibration pad that is isolated from the rest of the  
building, you will need to get a vibration isolation platform. Minus- 
K has excellent passive isolators (0.5Hz) and Herzan has excellent  
active isolators.

Sincerely yours,

George C. McMurtry, CEO
NanoAndMore USA, Inc.
9 James F. Byrnes Street
Lady's Island, SC  29907
toll free: 877-521-1108
fax: 843-521-1148
mcmurtry at nanoandmore.com
www.nanoandmore.com


Le 14 nov. 08 à 10:15, spm-request at spmlist.di.com a écrit :

> De : Andreas Straub <straubone at gmail.com>
> Date : 10 novembre 2008 14:38:00 HNEC
> À : spm at spmlist.di.com
> Objet : [Spm] noise in STM
>
>
> Dear Peng YANG,
>
> we have the same problem with an Omicron VT STM. Always 20 Hz noise  
> even at room temperature.
> Did you get any suggestions or found out by yourself? Could it be  
> the magnetic suspension oscillating?
> We are still struggling with the noise. I will let you know if we  
> find out something.
>
> Thanks a lot
>
> Andreas Straub
> -- 
> Dipl.-Phys. Andreas Straub
> Research Division on "Nanotechnology of Multifunctional Materials"
> CNR-Istituto per lo Studio dei Materiali Nanostrutturati (ISMN)
> Via P. Gobetti 101
> I-40129 Bologna, Italy
>
> tel.: +39-051-639-8505 (office)
>      +39-051-639-8523 (SPM lab)
> fax:  +39-051-639-8539
> e-mail: a.straub at bo.ismn.cnr.it
> web: http://www.bo.ismn.cnr.it/staff.php?idcur=41
>
> skype: straubi80

-----------------------------------------------------------
Peng YANG
Doctorant
Laboratoire LM2N
Directeur: Pr M.-P. Pileni
Université Pierre et Marie Curie
4 place Jussieu
75252 Paris Cedex 05
tel: 01 44 27 26 96
fax: 01 44 27 25 15


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