SlovakMan
Civil/Environmental
- Jul 27, 2010
- 2
I've searched the Internet for many weeks and have also looked at all 49 threads on this site to no avail. I work for a state government agency that is concerned about potential effects of nuclear electromagnetic pulses (EMP) and solar coronal mass ejections (CME). The concerns are based on two respected and recent publications: 1) Severe Space Weather Events--Understanding Societal and Economic Impacts Workshop Report (see ) and 2) High-Impact, Low-Frequency Event Risk to the North American Bulk Power System (see ) I recommend the second one especially to anyone involved in electric power transmission.
We feel we've got a handle on Faraday Cages to protect our equipment. However, a big concern is the functioning of vehicles after an EMP or CME. Constructing a fully shielded garage is a major and costly undertaking. Full protection is also difficult to achieve with everyday maintenance activities, e.g. constantly moving vehicles.
Can anyone provide some suggestions or advice on how to effectively shield & protect a single vehicle from EMP (the more severe problem) and CME??
We will only protect critical vehicles at designated locations. Ideally, the solution will also have portability, but we can live without that. Of course, every option would have to be grounded properly to drain off the magnetic fields. Probably would ground at all four corners of the vehicle. We'd like to achieve 60+ dB attenuation in the up to 3 GHz range. At least that's my understanding of requirements. The largest vehicle is 18 ft 4 in long, 6 ft 8 in wide, and 6 ft 7 in tall.
Some considerations we've had are:
== Silver or other metal fabric (difficult to electrically bond fabric sheets. also costly.)
== Metal plated plastic cages (difficult to electrically bond sections)
== RF shielded paints (enormously expensive, $90/liter)
FYI, I'm a Civil Engineer with some past electrical experiece including radar repair in the U.S. Air Force. I'm conversational, but not design savvy in electromagnetic work.
This problem has proven to be very challenging. Any ideas and suggestions would be most appreciated.
Mike (SlovakMan)
We feel we've got a handle on Faraday Cages to protect our equipment. However, a big concern is the functioning of vehicles after an EMP or CME. Constructing a fully shielded garage is a major and costly undertaking. Full protection is also difficult to achieve with everyday maintenance activities, e.g. constantly moving vehicles.
Can anyone provide some suggestions or advice on how to effectively shield & protect a single vehicle from EMP (the more severe problem) and CME??
We will only protect critical vehicles at designated locations. Ideally, the solution will also have portability, but we can live without that. Of course, every option would have to be grounded properly to drain off the magnetic fields. Probably would ground at all four corners of the vehicle. We'd like to achieve 60+ dB attenuation in the up to 3 GHz range. At least that's my understanding of requirements. The largest vehicle is 18 ft 4 in long, 6 ft 8 in wide, and 6 ft 7 in tall.
Some considerations we've had are:
== Silver or other metal fabric (difficult to electrically bond fabric sheets. also costly.)
== Metal plated plastic cages (difficult to electrically bond sections)
== RF shielded paints (enormously expensive, $90/liter)
FYI, I'm a Civil Engineer with some past electrical experiece including radar repair in the U.S. Air Force. I'm conversational, but not design savvy in electromagnetic work.
This problem has proven to be very challenging. Any ideas and suggestions would be most appreciated.
Mike (SlovakMan)