A
Anonymous
Guest
Can anyone tell me how the P.I. detector manufacturers go about tweaking their coils to get the best performance? What all is involved in making a good quality coil? Thanks William
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A
Anonymous
Guest
Hi William,
Basically you have to push the coil/cable capacitance resonant frequency as high as you can. This means using a good winding technique and a low capacity cable. Damping needs to be optimised to give a clean recovery after the TX pulse, with minimum ringing and overshoot. Good shielding is important but care is needed as this adds capacitance to the system. There is, of course, a bit more to it but I'm not giving all my trade secrets away just yet <img src="/metal/html/glasses.gif" border=0 width=15 height=15 alt="
">
There have been quite a lot of previous posts on coils, both here and on the GeoTech forum.
Eric.
Basically you have to push the coil/cable capacitance resonant frequency as high as you can. This means using a good winding technique and a low capacity cable. Damping needs to be optimised to give a clean recovery after the TX pulse, with minimum ringing and overshoot. Good shielding is important but care is needed as this adds capacitance to the system. There is, of course, a bit more to it but I'm not giving all my trade secrets away just yet <img src="/metal/html/glasses.gif" border=0 width=15 height=15 alt="
">There have been quite a lot of previous posts on coils, both here and on the GeoTech forum.
Eric.
A
Anonymous
Guest
Can you lower the capacitance with a series capacitor? Thanks William
<img src="/metal/html/grin.gif" border=0 width=15 height=15 alt=":grin">
<img src="/metal/html/grin.gif" border=0 width=15 height=15 alt=":grin">