  In non-inverted heating scenarios, a lower hybrid (LH) resonance can appear
in the plasma edge of tokamaks. This resonance can lead to large edge power
deposition when heating in the ion cyclotron resonance frequency (ICRF) range.
In this paper, the edge power loss associated with this LH resonance is
analytically computed for a cold plasma description using an asymptotic
approach and analytical continuation. This power loss can be directly linked to
the local radial electric field and is then compared to the corresponding power
loss computed with the semi-analytical code ANTITER IV. This method offers the
possibility to check the precision of the numerical integration made in ANTITER
IV and gives insights in the physics underlying the edge power absorption.
Finally, solutions to minimize this edge power absorption are investigated and
applied to the case of ITER's ion cyclotron resonance heating (ICRH) launcher.
This study is also of direct relevance to DEMO.
