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In this paper the role of particle beams in the generation of a close spatial and temporal correlation between hard X‐ray (HXR) energy and Hα line emission bursts in the solar flare of 2004 July 25 is discussed. The light curves in the HXR emission and Hα line reveal that the pre‐flare and main flare events are correlated with the variations of line‐of‐sight (LOS) magnetic flux. The HXR emission shows...