"The two weapon varieties that I know are capable of disrupting lightsaber magnetic fields and projecting the hot plasma contained therein and that are readily available are ion-based or electromagnetic plasma-based. Now, ion weapons are typically capable of disabling electronics but, in their small-arms varieties, are not lethal to organics, and the smallest electromagnetic plasma weapons, while man-portable, are typically used as squad automatic weapons"
The main difference between blasters and electromagnetic plasma weapons was the bolt's temperature: a blaster bolt was typically not hot enough to generate sufficient ionization to create the current densities required to fry a lightsaber's magnetic field, while the cooling systems required, as well as the temperatures required of the bolt, made it so that EM plasma was either confined to sniping or to suppressive fire in their man-portable varieties. Hence why Jessica wanted to issue Chalacta EM plasma sniper rifles to the Silvers' snipers, and also phase out the Korriban for the Ventooine as the standard issue heavy machinegun. However, the question Ultimatum asked was not innocuous: in Darth Krayt's day, the GA Remnant sent all false-positives they could to the Valley and, given enough time, they realized that midichlorians underwent scissiparity when fed enough ambient Force-energy, and then those false-positives were no longer false-positives once the midichlorian concentration increased high enough, which took a week or two. But the process ceased once they left the Valley.
"As for the Valley of Jedi, people usually come there for scholarship reasons, but people who were found as false-positives typically have other motives. For those who have found out that they were false-positives, they can go there to gain Force-sensitivity if they stay in the Valley long enough; in fact, most people who camp in the valley or otherwise go to the valley for more than one day are typically people who were false-positives"