From ce461809725c255be4691a3c5063ca4baf3cdbe1 Mon Sep 17 00:00:00 2001
From: Gamelin Alexis <alexis.gamelin@synchrotron-soleil.fr>
Date: Tue, 31 Aug 2021 11:41:59 +0200
Subject: [PATCH] [Fix] Sign of the dipolar wake potential
Fix the sign of the dipolar wake potential to get the correct sign of the tune shift in tracking with respect to the impedance/wake function conventions used in mbtack2.
---
tracking/wakepotential.py | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/tracking/wakepotential.py b/tracking/wakepotential.py
index 06bf737..71aec2b 100644
--- a/tracking/wakepotential.py
+++ b/tracking/wakepotential.py
@@ -276,10 +276,10 @@ class WakePotential(Element):
Wp = signal.convolve(profile0, W0*-1, mode='same')*dtau0
elif wake_type == "Wxdip":
dipole0 = self.dipole_moment(bunch, "x", tau0)
- Wp = signal.convolve(profile0*dipole0, W0*-1, mode='same')*dtau0
+ Wp = signal.convolve(profile0*dipole0, W0, mode='same')*dtau0
elif wake_type == "Wydip":
dipole0 = self.dipole_moment(bunch, "y", tau0)
- Wp = signal.convolve(profile0*dipole0, W0*-1, mode='same')*dtau0
+ Wp = signal.convolve(profile0*dipole0, W0, mode='same')*dtau0
else:
raise ValueError("This type of wake is not taken into account.")
--
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