Pavani (raga)
It is the 5th rāgam in the 7th "chakra Rishi". The mnemonic name is "Rishi-Ma". The mnemonic phrase is "sa ra ga mi pa dhi nu". Its "" structure is as follows (see "swaras" in Carnatic music for details on below notation and terms):

The notes used in this scale are "shuddha rishabham, shuddha gandharam, prati madhyamam, chathusruthi dhaivatham" and "kakali nishadham". It is a "sampurna" rāgam – a rāgam that has all seven "swaras" (notes). It is the "prati madhyamam" equivalent of "Manavati", which is the 5th "melakarta" scale. "Chandrajyoti" is a "janya" rāgam (derived scale) that is associated with it, in which Thyagaraja has composed couple of songs. See List of "janya" rāgams for a full list of "Pavani's janyas". This section covers the theoretical and scientific aspect of this rāgam. "Pavani's" notes when shifted using "Graha bhedam" does not yield any other "melakarta". "Graha bhedam" is the step taken in keeping the relative note frequencies same, while shifting the "shadjam" to the next note in the rāgam. This is obvious for the 6 "Rishi chakra" rāgams ("Salagam, Jalarnavam, Jhalavarali, Navaneetam" and "Raghupriya" being the other 5), as they have 3 missing notes between G1 and M2. Since no other "swara" pair in rules of "melakarta" rāgams have a 3 note gap, "Graha bhedam" yields only invalid scales within those rules.
Structure and Lakshana
It is the 41st "melakarta" rāgam in the 72 "melakarta" rāgam system of Carnatic music.