Contents
iv / 120 H157654_9_011
5.2 Minimum Ceiling Height .................................................................................................. 40
6 Magnetic Fringe Fields................................................................................................................... 43
6.1 Horizontal Fringe Fields .................................................................................................. 44
6.2 Vertical Fringe Fields ...................................................................................................... 45
6.3 Fringe Field Plots ............................................................................................................ 46
7 Environment and Site Survey Measurement ............................................................................... 47
7.1 Vibrations ........................................................................................................................ 47
7.1.1 Integrated Isolator Options.............................................................................................. 48
7.1.2 General Vibration Guidelines .......................................................................................... 48
7.1.3 Measuring Floor Vibrations ............................................................................................. 50
7.1.4 Floor Vibration Guidelines: Bruker EMI Damping System .............................................. 50
7.1.5 Floor Vibration Guidelines: Bruker Nano-C and Nano-D ................................................ 52
7.1.6 Floor Vibration Guidelines: Bruker Nano-C API Damping System ................................. 53
7.2 Magnetic Environment .................................................................................................... 55
7.2.1 Guidelines for Static Objects........................................................................................... 55
7.2.2 Guidelines for Moving Objects ........................................................................................ 55
7.3 Electromagnetic Interference .......................................................................................... 56
7.3.1 Types of EMF Interference ............................................................................................. 56
7.3.2 DC EMF Interference ...................................................................................................... 56
7.3.2.1 Measuring DC Fluctuating Fields.................................................................................... 57
7.3.2.2 Guidelines for DC Interference ....................................................................................... 57
7.3.2.3 Reducing DC Interference .............................................................................................. 57
7.3.3 AC EMF Interference ...................................................................................................... 58
7.3.3.1 Measuring AC EMF Interferences................................................................................... 58
7.3.3.2 Guidelines for AC EMF Interference ............................................................................... 59
7.3.3.3 Reducing AC EMF Interference ...................................................................................... 59
7.3.4 HF Interference ............................................................................................................... 59
7.3.4.1 Measuring HF Fluctuating Fields .................................................................................... 60
7.3.4.2 Most Commonly Studied Nuclei...................................................................................... 60
7.3.4.3 Guidelines for HF Interference........................................................................................ 60
7.3.4.4 Reducing HF Interference............................................................................................... 60
8 Utility Requirements....................................................................................................................... 61
8.1 Electrical Power Requirements....................................................................................... 61
8.1.1 System Grounding and Potential Equalization of Avance Systems................................ 63
8.2 Telecommunication......................................................................................................... 64
8.3 Compressed Gas ............................................................................................................ 64
8.3.1 General Requirements.................................................................................................... 64
8.3.2 Gas Supply ..................................................................................................................... 65
8.3.3 Other Specifications........................................................................................................ 66
8.3.4 Compressed Air System ................................................................................................. 67
8.3.4.1 Air Compressors ............................................................................................................. 68
8.3.4.2 Dryers ............................................................................................................................. 69
8.3.4.3 Filters .............................................................................................................................. 70
8.4 Liquid Nitrogen Requirements ........................................................................................ 70
8.5 Cooling Water ................................................................................................................. 70
8.6 Lighting ........................................................................................................................... 71